US LEC CORP
S-1/A, 1998-04-06
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>

   
     As filed with the Securities and Exchange Commission on April 6, 1998
                                                     Registration No. 333-46341
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, DC 20549


                                ---------------
   
                                AMENDMENT NO. 2
    
                                       TO


                                   FORM S-1
                            REGISTRATION STATEMENT
                                     UNDER
   
                           THE SECURITIES ACT OF 1933
    


                                ---------------
   
                                 US LEC Corp.
    
            (Exact Name of Registrant as Specified in Its Charter)

<TABLE>
<CAPTION>
                Delaware                                4813                     56-2065535
<S>                                        <C>                              <C>
        (State or Other Jurisdiction       (Primary Standard Industrial        (IRS Employer
     of Incorporation or Organization)      Classification Code Number)     Identification No.)
</TABLE>

                       212 South Tryon Street, Suite 1540
                        Charlotte, North Carolina 28281
                                (704) 319-1000
              (Address, Including Zip Code, and Telephone Number
       Including Area Code, of Registrant's Principal Executive Offices)

                              Tansukh V. Ganatra
                     President and Chief Operating Officer
                                 US LEC Corp.
                      212 South Tryon Street, Suite 1540
                        Charlotte, North Carolina 28281
                                (704) 319-1000
           (Name, Address, Including Zip Code, and Telephone Number,
                  Including Area Code, of Agent for Service)

   
                                   Copies to:
    

<TABLE>
<S>                                           <C>
             Barney Stewart III, Esq.                 Barry A. Brooks, Esq.
            Aaron D. Cowell, Jr., Esq.        Paul, Hastings, Janofsky & Walker LLP
             Moore & Van Allen, PLLC                     399 Park Avenue
        100 North Tryon Street, Floor 47          New York, New York 10022-4697
     Charlotte, North Carolina 28202-4003
</TABLE>

     Approximate date of proposed sale to the public: To commence as soon as
practicable after this Registration Statement becomes effective.
     If any of the securities registered on this form are to be offered on a
delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [ ]
     If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ]
     If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]
   
     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]
    
                                ---------------
     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant
shall file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Securities and Exchange Commission, acting
pursuant to said Section 8(a), may determine.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>

Information contained herein is subject to completion or amendment. A
registration statement relating to securities has been filed with the
Securities and Exchange Commission. These securities may not be sold nor may
offers to buy be accepted prior to the time the registration statement becomes
effective. This prospectus shall not constitute an offer to sell or the
soliciation of an offer to buy nor shall there be any sale of these securities
in any state in which such offer, solicitation or sale would be unlawful prior
to qualification under the securities laws of any such state.

   
                   SUBJECT TO COMPLETION DATED APRIL 6, 1998


PROSPECTUS
                                                      (US LEC logo appears here)

                                                                          
 
                               5,500,000 Shares

                                 US LEC Corp.
                              Class A Common Stock
    
                                 ------------
   
     The 5,500,000 shares of Class A Common Stock offered hereby are being sold
by US LEC Corp. (the "Company" or "US LEC"). Prior to this offering (the
"Offering"), there has not been a public market for the Class A Common Stock of
the Company. It is currently estimated that the initial public offering price
of the Class A Common Stock will be between $13.00 and $15.00 per share. See
"Underwriting" for information relating to factors to be considered in
determining the initial public offering price. The Class A Common Stock has
been conditionally approved for listing on the Nasdaq National Market under the
symbol "CLEC."
    
     The Company has two classes of common stock, the Class A Common Stock and
the Class B Common Stock (collectively, the "Common Stock"). The rights of the
holders of the Class A Common Stock and the Class B Common Stock are
substantially identical, except that (i) holders of the Class A Common Stock
are entitled to one vote per share and holders of the Class B Common Stock are
entitled to 10 votes per share and, except as provided in clause (ii), holders
of both classes vote together as one class on all matters submitted to a vote
of stockholders, including the election of directors; (ii) holders of the Class
B Common Stock vote as a separate class to elect two members of the Company's
Board of Directors; and (iii) the Class B Common Stock, subject to the terms of
an agreement among the holders of Class B Common Stock, is fully convertible at
any time into Class A Common Stock, at the option of the holder, or
automatically upon transfer to a person other than an existing holder of Class
B Common Stock or his, her or its Permitted Transferee (as defined), on a
one-for-one basis. See "Description of Capital Stock."
   
     After the Offering, Richard T. Aab, the Chairman, Chief Executive Officer
and a founder of US LEC, will own or otherwise control the vote of 100% of the
outstanding Class B Common Stock, representing approximately 94.8% of the total
voting power of the outstanding Common Stock. See "Risk Factors --  Control by
Single Stockholder," "Security Ownership of Management" and "Description of
Capital Stock."

     See "Risk Factors" beginning on page 7 for a discussion of certain factors
which should be considered by potential investors.
    
                                 ------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
                              A CRIMINAL OFFENSE.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
               Price to     Underwriting Discounts     Proceeds to
                Public        and Commissions (1)      Company (2)
<S>           <C>          <C>                        <C>
Per Share     $            $                          $
Total (3)     $            $                          $
</TABLE>

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
     (1) For information regarding indemnification of the Underwriters, see
         "Underwriting."
     (2) Before deducting expenses, estimated at $650,000, which are payable by
         the Company.
     (3) The Company has granted the Underwriters a 30-day option to purchase up
         to 825,000 additional shares of Class A Common Stock solely to cover
         over-allotments, if any. If such option is exercised in full, the total
         Price to Public, Underwriting Discounts and Commissions and Proceeds to
         Company will be $    , $     and $    , respectively. See
         "Underwriting."
                                 ------------
     The shares of Class A Common Stock are being offered by the several
Underwriters named herein, subject to prior sale, when, as and if accepted by
them and subject to certain conditions. It is expected that certificates for
the shares of Class A Common Stock offered hereby will be available for
delivery on or about     , 1998, at the office of Smith Barney Inc., 333 West
34th Street, New York, New York 10001 or through the facilities of The
Depository Trust Company.
                                 ------------
Salomon Smith Barney
                             Bear, Stearns & Co. Inc.
                                                               Wheat First Union

     , 1998.
<PAGE>

(Map appears here with the following cities pictured:

US LEC's Network

Roanoke  Richmond  Greensboro  Raleigh  Charlotte  Asheville  Wilmington
Knoxville  Greenville/Spartanburg  Charleston/Myrtle Beach  Nashville  Columbia
Atlanta  Memphis  Jacksonville  Orlando  Tampa  Ft. Lauderdale  Miami  

Switch Activation Schedule

(bullet) Markets currently served
(bullet) Service to be initiated during the remainder of 1998
(bullet) Service to be initiated in 1999


CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS THAT
STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE CLASS A COMMON STOCK,
INCLUDING OVER-ALLOTMENT, STABILIZING AND SHORT-COVERING TRANSACTIONS IN SUCH
SECURITIES, AND THE IMPOSITION OF A PENALTY BID, IN CONNECTION WITH THE
OFFERING. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
<PAGE>

                              PROSPECTUS SUMMARY

     The following is a summary of certain information contained elsewhere in
this Prospectus. Reference is made to, and this Prospectus Summary is qualified
in its entirety by, the more detailed information, including the consolidated
financial statements and notes thereto contained herein. The Company is the
successor to US LEC L.L.C., a Delaware limited liability company, that merged
into the Company on December 31, 1997. Unless the context otherwise requires,
the terms "US LEC" and the "Company" refer to US LEC Corp., a Delaware
corporation and its consolidated subsidiaries and the Company's predecessor, US
LEC L.L.C. Capitalized terms used in this Prospectus which are not otherwise
defined herein, have the meaning ascribed to them in the Glossary included in
this Prospectus. References herein to "EBITDA" refer to net earnings (loss)
before interest expense, income taxes, depreciation and amortization.
Information in this Prospectus, unless otherwise indicated, assumes that the
over-allotment option that has been granted to the Underwriters in the Offering
will not be exercised.


                                  The Company

     US LEC is a rapidly growing competitive local exchange carrier ("CLEC")
that provides switched local, long distance and enhanced telecommunications
services primarily to medium and large-sized organizations located in selected
markets in the southeastern United States. The Company was founded in June 1996
after passage of the Telecommunications Act of 1996 (the "Telecom Act"), which
enhanced the competitive environment for local exchange services. The Company
initiated service in Charlotte, North Carolina in March 1997, becoming one of
the first CLECs in North Carolina to provide switched local exchange services,
and subsequently initiated service in Raleigh and Greensboro, North Carolina
and in Atlanta, Georgia. As of February 28, 1998, the Company had 62,545
Equivalent Access Lines (as defined in the Glossary) in service. US LEC plans
to enter 15 new markets in Tennessee, Florida, South Carolina, Virginia and
North Carolina by the end of 1999. US LEC's objective is to become the primary
provider of switched local telecommunications services to its existing and
target customers.


                               Network Strategy

     US LEC purchases and deploys switching equipment and leases fiber optic
transmission capacity from competitive access providers ("CAPs"), other CLECs
and incumbent local exchange carriers ("ILECs"). Management believes that this
switch-based, leased-transport strategy provides the Company with significant
competitive advantages. By owning its switches, the Company is able to better
configure its network to provide cost-effective and customized solutions for
its customers' telecommunications needs. By leasing transmission capacity, the
Company is able to (i) reduce the up-front capital expenditures required to
enter new markets, (ii) avoid the risk of "stranded" investment in
under-utilized fiber networks and (iii) enter markets and generate revenue and
positive cash flow more rapidly than if the Company first constructed its own
transmission facilities. Management believes that the availability of several
suppliers of fiber optic transmission facilities in each of the Company's
markets provides US LEC with negotiating leverage, vendor diversity and the
ability to offer customers enhanced reliability at a competitive price.


                              Market Opportunity

     The Company focuses its primary sales efforts on
telecommunications-intensive organizations with at least 100 access lines,
including businesses, government agencies, other telecommunications companies
and value-added resellers ("VARs"). After completing its planned expansion, US
LEC will operate in 19 markets located in six contiguous states in the
southeastern United States -- one of the fastest growing regional markets for
business telecommunications services in the country. Within the Southeast, the
Company has selected its target markets based on a number of considerations,
including the number of potential customers and other competitors in such
markets and the presence of multiple transmission facility suppliers. Based on
the Company's study of state regulatory filings (the "Market Study"), in the
four markets presently served by the Company there were approximately 1.4
million business lines that generated approximately $2.1 billion in local
exchange and long distance revenues in 1996. The Market Study indicates that
the 19 markets in which management expects the


                                       1
<PAGE>

Company to be operating by the end of 1999 had a total of approximately 4.1
million business lines that generated approximately $5.7 billion in local
exchange and long distance revenues in 1996. The local and long distance
revenue figures reported in the Market Study do not include revenue associated
with enhanced services and carrier access fees, which US LEC is pursuing as
part of its business plan.

     Since commencing network operations, US LEC has achieved significant
growth in its Equivalent Access Lines in service and in the number of switched
minutes of use ("MOUs") carried over the Company's network. As indicated in the
following table, from March 1997 through February 1998, the Company increased
its number of Equivalent Access Lines in service at month-end from 288 to
62,545 and increased its monthly number of MOUs during the same period from
approximately 40,000 to approximately 450 million.



<TABLE>
<CAPTION>
                                                                          1997
                                  -------------------------------------------------------------------------------------
                                   Mar.   Apr.    May     June    July     Aug.     Sept.     Oct.     Nov.      Dec.
                                  ------ ------ ------- ------- -------- -------- --------- -------- -------- ---------
<S>                               <C>    <C>    <C>     <C>     <C>      <C>      <C>       <C>      <C>      <C>
Cumulative Equivalent
Access Lines in Service (1):
Charlotte .......................  288    757    2,204   2,881    4,571    5,157    9,789    10,863   12,824    16,724
Raleigh .........................   --    168      624   1,206    1,948    3,012    5,715     9,590   13,935    19,017
Greensboro ......................   --     --       --      --       --       --       --        --    3,168    13,488
Atlanta .........................   --     --       --      --       --       --       --        --       --        --
                                   ---    ---    -----   -----    -----    -----    -----    ------   ------    ------
 Totals .........................  288    925    2,828   4,087    6,519    8,169   15,504    20,453   29,927    49,229
                                   ===    ===    =====   =====    =====    =====   ======    ======   ======    ======
MOUs (in thousands) (2) .........   40    500    3,118   5,000   16,323   20,024   33,383    54,273   95,542   243,637
                                   ===    ===    =====   =====   ======   ======   ======    ======   ======   =======



<CAPTION>
                                         1998
                                  -------------------
                                     Jan.      Feb.
                                  --------- ---------
<S>                               <C>       <C>
Cumulative Equivalent
Access Lines in Service (1):
Charlotte .......................   24,943    27,027
Raleigh .........................   19,800    20,685
Greensboro ......................   14,203    14,689
Atlanta .........................       --       144
                                    ------    ------
 Totals .........................   58,946    62,545
                                    ======    ======
MOUs (in thousands) (2) .........  446,386   450,000
                                   =======   =======
</TABLE>

- ----------
(1) As of the end of the month indicated. "Equivalent Access Lines" is a term
    used by management to quantify the size of the Company's network. For a
    detailed definition, see Glossary.

(2) MOUs indicate the number of local and long distance switched minutes of use
    carried over the Company's network during the month indicated.

     The Company's existing North Carolina operations generated positive EBITDA
of $200,264 during the month of December 1997, ten months after the Company
first initiated service in Charlotte. While EBITDA does not represent cash flow
or results of operations in accordance with generally accepted accounting
principles, it is a measure of financial performance commonly used in the
telecommunications industry. Management expects the Company to achieve similar
operating results in each of its new markets within a comparable time frame.
Management attributes US LEC's ability to achieve this performance primarily to
two factors. First, the Company's capital-efficient network strategy eliminates
the lengthy "build-out" period usually required to construct a fiber optic
transmission network, permitting the Company to quickly enter new markets and
rapidly generate revenue and positive cash flow. Second, US LEC's
telecommunications-intensive customers typically transmit a large amount of
switched traffic over the Company's network, resulting in efficient network
utilization and attractive operating margins.


                                  Management

     US LEC believes that the quality of its management team has been a
critical factor in the Company's successful entry into existing markets and
will be a key to the implementation of its strategy in entering additional
markets. The Company has assembled a proven management team with extensive
telecommunications experience in the deployment of local exchange, long
distance, cellular and international gateway services in emerging competitive
environments. The Company's seven executive officers have an average of over 15
years of experience in the telecommunication services industry. In 1982,
Richard T. Aab, US LEC's Chairman and Chief Executive Officer, co-founded ACC
Corp., a publicly traded international telecommunications company, and served
that company in various capacities, including Chairman and Chief Executive
Officer, through mid-1997. Tansukh V. Ganatra, US LEC's President and Chief
Operating Officer, served as ACC Corp.'s President, Chief Operating Officer,
and Vice President of Engineering and Operations over a ten-year period ending
in 1997. Prior to joining ACC Corp., Mr. Ganatra spent 19 years at Rochester
Telephone Corp. (now part of Frontier Corp.), most recently serving as Director
of Network Engineering. Other key US LEC executives have extensive experience
in telecommunications engineering, marketing, sales, operations and regulation.
 

                                       2
<PAGE>

                               Business Strategy

     US LEC's objective is to become the primary provider of switched local
telecommunications services to its existing and target customers. The principal
elements of US LEC's strategy include:

o Deploy a Capital-Efficient Network. Management believes that US LEC is one of
  the first CLECs to utilize a strategy of purchasing and deploying switching
  equipment in each target market and leasing the required fiber optic
  transmission capacity from CAPs, other CLECs and ILECs. Management believes
  the Company's switch-based, leased-transport strategy enables it to enter
  markets and generate revenue and positive cash flow more rapidly than if the
  Company first constructed its own transmission facilities. This strategy
  also reduces the up-front capital expenditures required to enter new markets
  and avoids the risk of "stranded" investment in under-utilized fiber
  networks. Management also believes that the Company's ability to align its
  leased transmission costs with customer orders permits a higher return on
  invested capital.

o Focus on a Southeastern Cluster of Operations. After completing its planned
  expansion, the Company will operate in 19 markets located in six contiguous
  states in the southeastern United States -- one of the fastest growing
  regional markets for business telecommunications services in the country.
  Within the Southeast, the Company has selected its target markets based on a
  number of considerations, including the number of potential customers and
  other competitors in such markets and the presence of multiple transmission
  facility suppliers. Management believes that the Company's clustered network
  will enable it to take advantage of regional calling patterns and capture an
  increasing portion of customer traffic on its network. Management also
  believes that by originating and terminating calls on its network, the
  Company can achieve significant cost savings and potential pricing
  advantages over its competition.

o Target Telecommunications-Intensive Customers. The Company focuses its
  primary sales efforts on telecommunications-intensive organizations with at
  least 100 access lines, including businesses, government agencies, other
  telecommunications companies and VARs. The volume of usage generated by the
  Company's target customers allows the Company to efficiently concentrate the
  telecommunications traffic of its customers on one or more leased T-1 lines.
  In addition, the Company frequently is able to sell enhanced and long distance
  services to complement its core local services. This further enhances network
  utilization and improves margins, as fixed network costs are spread over a
  larger base of MOUs.

o Install a Robust, Uniform Technology Platform. The Company has chosen the
  5ESS(R)-2000 digital switch manufactured by Lucent Technologies, Inc.
  ("Lucent") to provide a consistent technology platform throughout its
  network. The Lucent switch enables the Company to provide both local and
  long distance services from a single platform. This uniform and advanced
  switching platform enables the Company to (i) deploy features and functions
  quickly throughout its entire network, (ii) expand switch capacity in a cost
  effective manner, (iii) lower maintenance costs through reduced training and
  spare part requirements and (iv) achieve direct connectivity to cellular and
  personal communication system applications in the future.

o Employ a Direct Sales Force with Extensive Local Market Experience.
  Management believes that the Company's success in a particular market is
  enhanced by employing a direct sales force with extensive local market and
  telecommunications sales experience. The Company employed this strategy in
  building its existing sales forces in North Carolina and Georgia and intends
  to continue implementing this strategy in other markets. Salespeople with
  experience in a particular market provide the Company with extensive
  knowledge of the Company's target customer base and in many cases already
  have existing relationships with target customers. The experience and
  relationships of these salespeople enable them to pre-sell the Company's
  products and services prior to initiating network operations in a particular
  market.

o Implement Efficient Provisioning Processes. Management believes that a
  critical aspect of the success of a CLEC is timely and effective
  provisioning systems, which includes the process of transitioning ILEC
  customers to the Company's network. The Company focuses on implementing
  effective and timely provisioning practices in each of its markets to
  rapidly and efficiently transition customers from the ILEC to the Company
  without disruption of the customer's operations. Management believes that
  these practices provide the Company with a long-term competitive advantage
  and enable it to implement services in its markets rapidly and to shorten
  the time between receipt of the customer order and the generation of
  revenue.


                                       3
<PAGE>

                                 The Offering

Class A Common Stock offered by
 the Company.......................   5,500,000 shares

Common Stock to be outstanding after the Offering:
  Class A Common Stock.............   9,355,000 shares (1)
  Class B Common Stock.............   17,075,270 shares
    Total..........................   26,430,270 shares (1)

Use of Proceeds....................   The Company intends to use substantially
                                      all of the net proceeds from the Offering
                                      for capital expenditures relating to its
                                      expansion into new markets. See "Use of
                                      Proceeds."

Nasdaq National Market Symbol......   CLEC
- ----------
(1) Excludes 469,000 shares of Class A Common Stock issuable upon exercise of
    outstanding warrants having exercise prices ranging from $2.86 to $10.00
    per share, 182,800 shares issuable upon exercise of outstanding options
    granted under the US LEC Corp. 1998 Omnibus Stock Plan (the "Stock Plan")
    with an exercise price of $10.00 per share and 10,000 shares issuable upon
    exercise of options to be granted at the completion of the Offering having
    an exercise price equal to the initial public offering price.


                                 Risk Factors

     See "Risk Factors" for a discussion of certain factors which should be
considered by prospective purchasers of the Class A Common Stock.


                                    Address

     The principal executive offices of the Company are located at 212 South
Tryon Street, Suite 1540, Charlotte, North Carolina 28281. The Company's
telephone number is (704) 319-1000.


                                       4
<PAGE>

         SUMMARY HISTORICAL CONSOLIDATED FINANCIAL AND OPERATING DATA

     The summary historical consolidated financial data presented below as of
December 31, 1996 and 1997, for the period from June 6, 1996 (inception) to
December 31, 1996 and for the year ended December 31, 1997 are derived from and
qualified by reference to the audited consolidated financial statements and
notes thereto of US LEC contained elsewhere in this Prospectus. The Company's
consolidated financial statements as of December 31, 1996 and 1997, for the
period from June 6, 1996 (inception) to December 31, 1996 and for the year
ended December 31, 1997, have been audited by Deloitte & Touche LLP,
independent public accountants. The summary historical financial data for each
quarter of 1997 have been derived from the unaudited interim consolidated
financial statements of the Company. In the opinion of management, the
unaudited interim consolidated financial statements have been prepared on the
same basis as the audited consolidated financial statements and include all
adjustments, which consist only of normal recurring adjustments, necessary for
a fair presentation of the financial position and the results of operations for
these periods. All of the data should be read in conjunction with and are
qualified by reference to "Management's Discussion and Analysis of Financial
Condition and Results of Operations" and the audited consolidated financial
statements and notes thereto of the Company contained elsewhere in this
Prospectus.



   
<TABLE>
<CAPTION>
                                                 Period from                            Quarter Ended
                                                June 6, 1996   ---------------------------------------------------------------
                                               (Inception) to
                                                December 31,      March 31,        June 30,     September 30,    December 31,
                                                    1996             1997            1997            1997            1997
                                              ---------------- --------------- --------------- --------------- ---------------
<S>                                           <C>              <C>             <C>             <C>             <C>
Statement of Operations Data:
Revenue .....................................  $          --    $      1,141     $   228,620    $  1,529,745    $   4,698,155
Cost of services ............................             --         423,093         314,828       1,075,183        2,387,897
                                               -------------    ------------     -----------    ------------    -------------
Gross margin ................................             --        (421,952)        (86,208)        454,562        2,310,258
Selling, general and administrative .........        941,743       1,049,130       1,047,940       1,294,115        2,726,152
Depreciation and amortization ...............          4,059          14,046          88,406         124,994          215,468
                                               -------------    ------------     -----------    ------------    -------------
Loss from operations ........................       (945,802)     (1,485,128)     (1,222,554)       (964,547)        (631,362)
Interest expense, net .......................         16,861          66,556         108,021         101,326           78,953
                                               -------------    ------------     -----------    ------------    -------------
Net loss ....................................  $    (962,663)   $ (1,551,684)   ($ 1,330,575)   $ (1,065,873)   $    (710,315)
                                               =============    ============     ===========    ============    =============
Net loss per share ..........................  $        (.06)   $       (.09)    $      (.07)   $       (.06)   $        (.04)
                                               =============    ============     ===========    ============    =============
Weighted average shares outstanding .........     17,310,000      17,310,000      17,832,750      19,075,500       20,239,500
                                               =============    ============     ===========    ============    =============
Other Financial Data:
Capital expenditures ........................  $     279,634    $  1,798,152     $   634,122    $    828,903    $   9,793,930
EBITDA (1) ..................................       (941,743)     (1,471,082)     (1,134,148)       (839,553)        (415,894)
Net cash flow used in operating
 activities .................................     (1,079,069)     (1,043,972)     (1,253,840)     (1,168,631)      (2,127,650)
Net cash flow provided by (used in)
 investing activities .......................       (465,792)     (1,598,152)     (3,251,162)      1,303,141       (2,405,058)
Net cash flow provided by financing
 activities .................................      2,271,000       2,400,000       4,848,244       1,335,280        5,424,871
Operating Data:
Cumulative Equivalent Access Lines in
 service (2) ................................             --             288           4,087          15,504           49,229
MOUs (3) ....................................             --          40,000       8,618,000      69,730,000      393,452,000



<CAPTION>
                                                 Year Ended
                                                December 31,
                                                    1997
                                              ---------------
<S>                                           <C>
Statement of Operations Data:
Revenue .....................................  $  6,457,661
Cost of services ............................     4,201,001
                                               ------------
Gross margin ................................     2,256,660
Selling, general and administrative .........     6,117,337
Depreciation and amortization ...............       442,914
                                               ------------
Loss from operations ........................    (4,303,591)
Interest expense, net .......................       354,856
                                               ------------
Net loss ....................................  $ (4,658,447)
                                               ============
Net loss per share ..........................  $       (.25)
                                               ============
Weighted average shares outstanding .........    18,653,308
                                               ============
Other Financial Data:
Capital expenditures ........................  $ 13,055,107
EBITDA (1) ..................................    (3,860,677)
Net cash flow used in operating
 activities .................................    (5,594,093)
Net cash flow provided by (used in)
 investing activities .......................    (5,951,231)
Net cash flow provided by financing
 activities .................................    14,008,395
Operating Data:
Cumulative Equivalent Access Lines in
 service (2) ................................        49,229
MOUs (3) ....................................   471,840,000
</TABLE>
    


<TABLE>
<CAPTION>
                                                                                    As of December 31, 1997
                                                                    --------------------------------------------------------
                                                        As of
                                                     December 31,                                             Pro Forma
                                                         1996            Actual        Pro Forma (4)     As Adjusted (4) (5)
                                                    -------------   ---------------   ---------------   --------------------
<S>                                                 <C>             <C>               <C>               <C>
Balance Sheet Data:
Current assets ..................................    $1,067,662      $  9,654,993      $  9,654,993          $80,614,993
Working capital (deficiency) ....................       936,884        (2,268,883)       (2,268,883)          68,691,117
Property and equipment, net .....................       276,097        12,889,335        12,889,335           12,889,335
Total assets ....................................     1,466,835        22,680,681        22,680,681           93,640,681
Notes payable -- stockholders ...................     1,671,000         5,000,000                --                   --
Total stockholders' equity (deficiency) .........      (334,943)        5,756,805        10,756,805           81,716,805
</TABLE>

 

                                       5
<PAGE>

- ----------
(1) EBITDA consists of net earnings (loss) before interest expense, income
    taxes, depreciation and amortization. It is a measure commonly used by
    analysts, investors and other interested parties in the telecommunications
    industry and is presented to assist in understanding the Company's
    operating results. However, EBITDA is not a measurement of financial
    performance under generally accepted accounting principles and should not
    be considered an alternative to net income or (loss) as a measure of
    performance or to cash flow as a measure of liquidity. EBITDA is not
    necessarily comparable with similarly titled measures for other companies.
     

(2) As of the end of the period indicated. "Equivalent Access Lines" is a term
    used by management to quantify the size of the Company's network. For a
    detailed definition, see Glossary.

(3) MOUs indicate the number of local and long distance switched minutes of use
    carried over the Company's network during the period indicated.

   
(4) Reflects the exchange of a note payable to a stockholder in the amount of
    $5.0 million for 480,770 shares of Class B Common Stock on February 14,
    1998. See "Certain Relationships and Related Transactions" and Note 9 to
    the Company's consolidated financial statements for the year ended
    December 31, 1997.
    

(5) Adjusted to reflect the sale of Class A Common Stock offered hereby (based
    on an assumed initial public offering price of $14.00 per share) assuming
    no exercise of the Underwriters' over-allotment option, and after
    deducting the Underwriters' Discounts and Commissions and estimated
    expenses of the Offering. See "Use of Proceeds."


                                       6
<PAGE>

                                 RISK FACTORS

     Prospective investors should consider carefully the following factors
together with the other information contained in this Prospectus:


Limited Operating History

     US LEC was formed in June 1996, began generating revenue in March 1997 and
has a relatively small number of customers. Accordingly, prospective investors
have very limited historical operating and financial information upon which to
base an evaluation of the Company's performance and an investment in the Class
A Common Stock. Given the Company's limited operating history, there can be no
assurance that it will be able to compete successfully in the
telecommunications business, achieve or sustain profitability or generate
sufficient positive cash flow in the future to meet debt service, working
capital or other cash requirements. See "Management's Discussion and Analysis
of Financial Condition and Results of Operations."


Risks Associated with Implementation of Growth Strategy

     The expansion and development of US LEC's operations will depend on, among
other things, the Company's ability to (i) accurately assess potential new
markets, (ii) identify, hire and retain qualified personnel, (iii) lease access
to suitable fiber optic networks, (iv) purchase, install and operate switches
and (v) obtain any required government authorizations, all in a timely manner,
at reasonable costs and on satisfactory terms and conditions. In addition, US
LEC has experienced rapid growth since its inception, and management believes
that sustained growth will place a strain on operational, human and financial
resources. The Company's ability to manage its expansion effectively will also
depend on the continued development of plans, systems and controls for its
operational, financial and management needs. Given the Company's limited
operating history, there can be no assurance that the Company will be able to
satisfy these requirements or otherwise manage its growth effectively. The
failure of US LEC to satisfy these requirements could have a material adverse
effect on the Company's financial condition and its ability to fully implement
its expansion plans.

     The Company's growth strategy also involves the following risks:

     Qualified Personnel. A critical component for US LEC's success will be
hiring and retaining additional qualified managerial, sales and technical
personnel. Since its inception, the Company has experienced significant
competition in hiring and retaining personnel possessing necessary skills and
telecommunications experience. Although management believes the Company has
been successful in hiring and retaining qualified personnel, there can be no
assurance that US LEC will be able to do so in the future.

     Switch and Equipment Installation. An essential element of the Company's
current strategy is the provision of switched local service. There can be no
assurance that installation of the switches and associated electronics
necessary to implement the Company's business plan will continue to be
completed on a timely basis or that, during the testing of this equipment, the
Company will not experience technological problems that cannot be resolved. The
failure of the Company to install and operate successfully additional switches
and other network equipment could have a material adverse effect on the
Company's financial condition and its ability to enter additional markets.

     Interconnection Agreements. The Company has agreements for the
interconnection of its networks with the networks of the ILECs covering each
market in which US LEC either has or is currently installing a switching
platform. US LEC may be required to negotiate new, or renegotiate existing,
interconnection agreements as it enters new markets in the future, such as in
Virginia and Florida. In addition, as its existing interconnection agreements
expire, it will be required to negotiate extension or replacement agreements.
There can be no assurance that the Company will successfully negotiate such
other agreements for interconnection with the ILECs or renewals of existing
interconnection agreements on terms and conditions acceptable to the Company. A
decision by the United States Court of Appeals for the Eighth Circuit vacating
several of the FCC's rules creates uncertainty about the rules governing
pricing, terms and conditions of interconnection agreements. As a result of
this decision, which has been appealed to the U.S. Supreme Court, and a pending
review of this issue by the FCC, negotiating and enforcing such agreements
could become more difficult and protracted, and renegotiation of


                                       7
<PAGE>

existing agreements could be required. See "Business -- Regulation -- Eighth
Circuit Court of Appeals Decision." The failure to negotiate and obtain
required interconnection agreements on terms and conditions acceptable to the
Company could have a material adverse effect on the Company's ability to
rapidly enter a particular market and on its operations in its existing
markets.

     Ordering, Provisioning and Billing. The Company has developed processes
and procedures and is working with external vendors, including the ILECs, in
the implementation of customer orders for services, the provisioning,
installation and delivery of such services and monthly billing for those
services. The failure to manage effectively processes and systems for these
service elements or the failure of the Company's current vendors or the ILECs
to deliver ordering, provisioning and billing services on a timely and accurate
basis could have a material adverse effect upon the Company's ability to
achieve its growth strategy.

     Products and Services. The Company currently focuses its efforts on
providing local and long distance telecommunications services. In order to
address the needs of its target customers, the Company will be required to
emphasize and develop additional products and services. No assurance can be
given that the Company will be able to provide the range of telecommunication
services that its target customers need or desire.

     Acquisitions. US LEC may acquire other businesses as a means of expanding
into new markets or developing new services. The Company is unable to predict
whether or when any prospective acquisitions will occur or the likelihood of a
material transaction being completed on favorable terms and conditions. Such
transactions involve certain risks including, but not limited to, (i)
difficulties assimilating acquired operations and personnel; (ii) potential
disruptions of the Company's ongoing business; (iii) the diversion of resources
and management time; (iv) the possibility that uniform standards, controls,
procedures and policies may not be maintained; (v) risks associated with
entering new markets in which the Company has little or no experience; and (vi)
the potential impairment of relationships with employees or customers as a
result of changes in management. If an acquisition were to be made, there can
be no assurance that the Company would be able to obtain the financing to
consummate any such acquisition on terms satisfactory to it or that the
acquired business would perform as expected.


Uncertainties Related to Reciprocal Compensation

     The Telecom Act requires ILECs to provide reciprocal compensation to a
CLEC for local traffic terminated on such CLEC's network. Notwithstanding this
requirement, a number of Regional Bell Operating Companies ("RBOCs") have taken
the position that traffic terminated to enhanced service providers ("ESPs"),
including information service providers such as internet service providers
("ISPs"), is not local traffic. CLECs have been generally successful in
challenging the RBOCs in public utility commission ("PUC") proceedings in
several states, including North Carolina (a proceeding that the Company
initiated) and Virginia. The PUCs in Florida, Georgia and Tennessee are
currently reviewing this issue. Although the Company is not a party to these
proceedings, it is considering joining them as an intervening party. The
Company is not aware of any current proceedings involving this issue before the
South Carolina PUC, the only other state in the Company's current and proposed
operating territory. In addition to the various state PUC proceedings, this
issue is under general review by the FCC.

   
     In August 1997, BellSouth Telecommunications, Inc. ("BellSouth") notified
the Company and other CLECs that it would not pay or collect reciprocal
compensation under interconnection agreements for traffic terminated to an ESP
or an ISP. The Company petitioned the North Carolina PUC to resolve this issue.
On February 26, 1998, the North Carolina PUC ruled that the reciprocal
compensation provision contained in the interconnection agreement between
BellSouth and the Company is fully applicable to traffic terminated to ESP and
ISP customers when the originating caller and the called number are associated
with the same calling area, and directed BellSouth to bill and pay reciprocal
compensation for all such calls. On March 27, 1998, BellSouth filed a motion
requesting (i) a stay of the order issued by the NC PUC, (ii) an extension of
the period during which BellSouth must file an appeal of the NC PUC order with
an intermediate state appeallate court and (iii) permission to deposit the
disputed amounts into an interest bearing escrow account under the control of
an agent acceptable to both parties. In an order dated March 31, 1998, the NC
PUC granted BellSouth's motion, thereby extending the appeal period to April
27, 1998. In addition, under the Telecom Act, BellSouth may be entitled to seek
review of the decision of the North Carolina PUC by the United States District
Court for the Eastern District of North Carolina.
    


                                       8
<PAGE>

     A significant portion of the Company's estimated total revenue for 1998
and 1999 is expected to be derived from reciprocal compensation from BellSouth
for traffic terminated on US LEC's network to ESPs and ISPs in North Carolina.
If a decision adverse to the Company is issued on any appeal or review of the
order of the North Carolina PUC, by the FCC or by one or more PUCs in other
southeastern states in which the Company currently operates or plans to operate
in the future, the ability of the Company to serve existing and future ESP and
ISP customers profitably would be limited, which could have a material adverse
affect on US LEC's operating results, financial condition and current strategy.
 


Dependence on Key Personnel

     The Company's business is managed by a small number of key executive
officers, most notably Richard T. Aab, Chairman and Chief Executive Officer,
and Tansukh V. Ganatra, President and Chief Operating Officer. The loss of the
services of one or more of these key people, particularly Mr. Aab or Mr.
Ganatra, could materially and adversely affect US LEC's business and its
prospects. None of the Company's executive officers have employment agreements
or are subject to noncompetition agreements, and the Company does not maintain
key man life insurance on any of its officers. The competition for qualified
managers in the telecommunications industry is intense. Accordingly, there can
be no assurance that US LEC will be able to hire and retain necessary personnel
in the future to replace any of its key executive officers, if any of them were
to leave US LEC or be otherwise unable to provide services to US LEC.


Reliance on Leased Capacity

     A key element of US LEC's business and growth strategy is leasing fiber
optic transmission capacity instead of constructing its own transport
facilities. In implementing this strategy, the Company relies upon its ability
to lease capacity from CAPs, other CLECs and ILECs operating in its markets. In
order for this strategy to be successful, the Company must be able to negotiate
and renew satisfactory agreements with its fiber optic network providers, and
the providers must process provisioning requests on a timely basis, maintain
their networks in good working order and provide adequate capacity. Although US
LEC enters into agreements with its network providers that are intended to
ensure access to adequate capacity and timely processing of provisioning
requests, (and although US LEC's interconnection agreements with ILECs
generally provide that the Company's connection and maintenance orders will
receive attention at parity with the ILECs and other CLECs and that adequate
capacity will be provided), there can be no assurance that the ILECs and other
network providers will comply with their contractual (and, in the case of the
ILECs, legally required) network provisioning obligations, or that the
provisioning process will be completed for the Company's customers on a timely
and otherwise satisfactory basis. Furthermore, there can be no assurance that
the rates to be charged to US LEC under future interconnection agreements or
lease agreements with other providers will allow the Company to offer usage
rates low enough to attract a sufficient number of customers and operate its
networks at satisfactory margins.


Competition

     The telecommunications industry is highly competitive. In each of the
Company's existing and target markets, the Company competes and will continue
to compete principally with the ILECs serving that area. ILECs are established
providers of local telephone services to all or virtually all telephone
subscribers within their respective service areas. ILECs also have greater
financial and personnel resources, brand name recognition and long-standing
relationships with regulatory authorities at the federal and state levels.

     The Company also faces, and expects to continue to face, competition from
other current and potential market entrants, including long distance carriers
seeking to enter, reenter or expand entry into the local exchange marketplace,
and from other CLECs, CAPs, cable television companies, electric utilities,
microwave carriers, wireless telephone system operators and private networks
built by large end-users. In addition, a continuing trend toward combinations
and strategic alliances in the telecommunications industry could give rise to
significant new competitors. Many of these current and potential competitors
have financial, personnel and other resources, including brand name
recognition, substantially greater than those of the Company, as well as other
competitive advantages over the Company.

     The Company also competes with long distance carriers in the provisioning
of long distance services. Although the long distance market is dominated by
four major competitors, hundreds of other companies also compete in the long
distance marketplace.


                                       9
<PAGE>

     In addition, the regulatory environment in which the Company operates is
undergoing significant change. As this regulatory environment evolves, changes
may occur which could create greater or unique competitive advantages for all
or some of the Company's current or potential competitors, or could make it
easier for additional parties to provide services. See "Business --
Competition."


Regulation

     Although passage of the Telecom Act has resulted in increased
opportunities for companies that are competing with the ILECs, no assurance can
be given that changes in current or future regulations adopted by the FCC or
state regulators or other legislative or judicial initiatives relating to the
telecommunications industry would not have a material adverse effect on the
Company. In addition, although the Telecom Act, as passed, conditions RBOCs'
provisioning of in-region long distance service on a showing that the local
market has been opened to competition, a United States District Court in Texas
has held these portions of the Telecom Act invalid. That decision has been
stayed pending appeal, and has been appealed to the United States Court of
Appeals for the Fifth Circuit. If the decision is upheld, it could (i) remove
the incentive RBOC's presently have to cooperate with companies like US LEC to
foster competitition within their service areas so that they can qualify to
offer in-region long distance by allowing RBOC's to offer such services
immediately and (ii) give the RBOC's the ability to offer "one-stop shopping"
for both long distance and local service. The Company cannot yet determine when
or how the Court will rule on this appeal. If the decision is reversed, there
can be no assurance that these ILECs will negotiate quickly with competitors
such as the Company for the required interconnection of the competitor's
networks with those of the ILEC or provisioning of services on a timely basis,
or that such interconnection agreements will be on terms acceptable to the
Company.

     On May 8, 1997, the FCC released an order establishing a significantly
expanded federal telecommunications universal service program which both
increased the size of existing subsidies and created new subsidy funds to which
the Company may be required to contribute. These funds relate to subsidies for
certain services offered in high-cost areas or to low income subscribers,
schools, libraries and rural healthcare providers. As of December 31, 1997, the
Company was unable to quantify the payments, if any, that it will be required
to make for the year. Based upon preliminary guidance provided by the FCC
regarding the calculation of these payments, management believes that the
amount of any such payments will not be material for 1997. In the May 8 order,
the FCC also announced that it will soon revise its rules for subsidizing
service provided to consumers in high cost areas. The Company also may be
required to contribute to state-established funds.

     The Telecom Act also governs interconnection, resale of ILEC services by
CLECs, lease of unbundled network elements and termination of traffic. On July
18, 1997, the United States Court of Appeals for the Eighth Circuit overturned
many of the rules the FCC had established pursuant to the Telecom Act. The
Eighth Circuit decision substantially limits the FCC's jurisdiction and expands
the state regulators' jurisdiction to set and enforce rules governing the
development of local competition. As a result, it is more likely that the rules
governing local competition will vary substantially from state to state. Most
states, however, have already begun to establish rules for local competition
that are consistent with the FCC rules overturned by the Eighth Circuit. If a
patchwork of state regulations were to develop, it could increase the Company's
costs of regulatory compliance and could make entry into, and conducting
business, in some markets more difficult and expensive than in others. The U.S.
Supreme Court has decided to review the Eighth Circuit's decision. There can be
no assurance as to how or when the U.S. Supreme Court will act on the appeals
or that the outcome of the appeals will not have a material adverse effect on
the Company. See "Business -- Regulation."


Negative Cash Flow and Operating Losses

   
     The Company intends to satisfy most of its working capital needs through
cash generated from operations. To date, the Company has not generated positive
cash flow from its operations on a consolidated basis. Moreover, US LEC's
operations have resulted in net losses of $962,663 for the period from
inception (June 6, 1996) through December 31, 1996 and approximately $4.7
million for the year ended December 31, 1997. There can be no assurance that
the Company will achieve or sustain profitability or generate positive cash
flow in the future. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations."
    


                                       10
<PAGE>

Future Capital Requirements

     Implementation of the Company's expansion plans will require significant
capital expenditures. The Company's principal capital expenditures relate to
the purchase and installation of its switching platform. The Company estimates
that the capital expenditures required to fund its expansion plans will
approximate $40 million in 1998 and $30 million in 1999. Management expects to
satisfy these capital requirements primarily with the net proceeds of this
Offering, although there can be no assurance that the actual capital
expenditures required to complete the Company's proposed expansion will not
exceed such estimated amounts. In addition, the actual amount and timing of the
Company's future capital expenditures may differ materially from the Company's
estimates as a result of, among other things, the ability of the Company to
meet its planned expansion schedule, the number of its customers and the
services for which they subscribe and regulatory, technological and competitive
developments in the Company's industry. Due to the uncertainty of these
factors, actual revenues and costs may vary from expected amounts, possibly to
a material degree, and such variations are likely to affect the Company's
planned capital expenditures.

     The Company also will continue to evaluate revenue opportunities in other
southeastern markets as well as potential acquisitions and, as and when
attractive opportunities develop, the Company may elect to pursue such
opportunities. The Company expects to obtain the capital required to pursue
such opportunities from credit facilities and other borrowings, the sale of
additional equity or debt securities or cash generated from operations. There
can be no assurance, however, that the Company would be successful in raising
sufficient additional capital on acceptable terms or that the Company's
operations would produce sufficient positive cash flow to pursue such
opportunities should they arise. Failure to raise and generate sufficient funds
or unanticipated increases in capital requirements may require the Company to
delay or curtail its expansion plans, which could have a material adverse
effect on the Company's growth and its ability to compete in the
telecommunications services industry. See "Management's Discussion and Analysis
of Financial Condition and Results of Operations -- Liquidity and Capital
Resources."


Variability of Quarterly Operating Results

     As a result of the significant expenses associated with the Company's
expansion into new markets, the Company anticipates that its operating results
will vary significantly from period to period.


Control by Single Stockholder

     As of the date of this Prospectus, Richard T. Aab beneficially owns or
otherwise controls 100% of the outstanding shares of Class B Common Stock
representing approximately 97.8% of the Company's total voting power, without
giving effect to the Offering, and approximately 94.8% of the Company's total
voting power after giving effect to the Offering. In addition, holders of Class
B Common Stock are entitled to vote as a separate class to elect two members of
the Board of Directors and to vote with the holders of Class A Common Stock for
the election of other members of the Board of Directors. As a result, Mr. Aab
will be able to control the board and all stockholder decisions and, in
general, to determine (without the consent of the Company's other stockholders)
the outcome of any corporate transaction or other matter submitted to the
stockholders for approval, including mergers, consolidations and the sale of
all or substantially all of the Company's assets. Mr. Aab also has the power to
prevent or cause a change in control of the Company. See "Security Ownership of
Management" and "Description of Capital Stock."


Absence of Prior Public Market; Possible Volatility of Stock Price

     Prior to the Offering, there has been no public market for the Class A
Common Stock, and there can be no assurance that an active trading market for
the Class A Common Stock will develop or be sustained after the Offering. The
initial public offering price of the Class A Common Stock will be determined
through negotiations with the representatives of the Underwriters. There can be
no assurance that future market prices for the Class A Common Stock will equal
or exceed the initial public offering price set forth on the cover page of this
Prospectus. The market prices of securities of early stage telecommunications
companies similar to the Company have historically been highly volatile. See
"Underwriting." Future announcements concerning the Company or its competitors,
including quarterly results, technological innovations, services, government
legislation or regulation, and general market, economic and political
conditions, may have a significant effect on the market price of the Class A
Common Stock.


                                       11
<PAGE>

Substantial Dilution

     Purchasers of the Class A Common Stock in the Offering will incur
immediate and substantial dilution in net tangible book value per share. As of
December 31, 1997, on a pro forma basis, the Company's existing stockholders
have paid an average price of $0.78 per share for their shares of Common Stock
compared to an assumed initial public offering price of $14.00 per share for
shares of Class A Common Stock purchased by investors in the Offering. See
"Dilution."


Potential Effect on Market Price of Future Sales of Shares

     Upon completion of the Offering, 26,430,270 shares of Common Stock will be
outstanding. Of these shares, the 5,500,000 shares of Class A Common Stock
expected to be sold in the Offering will be freely tradable without restriction
under the Securities Act of 1933, as amended (the "Securities Act"), except for
any such shares which may be acquired by an "affiliate" of the Company as that
term is defined in Rule 144 ("Rule 144") under the Securities Act. The
remainder of the outstanding shares of Class A Common Stock, and all of the
shares of Class B Common Stock outstanding after the Offering, will be
"restricted securities" as that term is defined in Rule 144. These shares of
Class A Common Stock (and shares of Class A Common Stock acquired upon the
conversion of Class B Common Stock by the current holders thereof) will begin
to become eligible for sale in the public market after December 31, 1998,
subject to the volume, manner of sale and other limitations of Rule 144.

   
     The Company, its directors and executive officers, who, as of March 31,
1998, beneficially owned a total of 19,343,270 shares of Common Stock, have
agreed not to offer, sell or contract to sell, or otherwise dispose of,
directly or indirectly, or announce an offering of, any shares of Class A
Common Stock or any securities convertible into, or exchangeable for, shares of
Class A Common Stock for a period of 180 days from the date of this Prospectus,
without the prior written consent of Smith Barney Inc., except under limited
circumstances. See "Underwriting."
    

     Promptly after completion of the Offering, the Company intends to file a
Registration Statement on Form S-8 with the Commission to register 650,000
shares of Class A Common Stock reserved for issuance or sale under the Stock
Plan.

     No prediction can be made as to the effect, if any, that future sales of
shares, or the availability of shares for future sale, will have on the market
price of the Class A Common Stock prevailing from time to time. Sales of
substantial amounts of Class A Common Stock (including shares issued upon the
exercise of outstanding stock options and warrants and conversion of shares of
Class B Common Stock), or the perception that such sales could occur, could
adversely affect the prevailing market prices of the Class A Common Stock. See
"Shares Eligible for Future Sale."


Risks Regarding Forward Looking Statements

     The statements contained in this Prospectus and in associated filings by
the Company with the Securities and Exchange Commission (the "Commission")
which are not historical facts are "forward-looking statements" (as such term
is defined in the Private Securities Litigation Reform Act of 1995). These
statements are identified by the use of forward-looking terminology such as
"believes," "expects," "may," "will," "should," "estimates" or "anticipates" or
the negative thereof or other variations thereon or comparable terminology, or
by discussions of strategy that involve risks and uncertainties. Management
wishes to caution the reader that these forward-looking statements, such as
those relating to the Company's plans to enter new markets, its anticipation of
revenues from new markets, and statements regarding the development of the
Company's businesses, the markets for the Company's services and products, the
Company's anticipated capital expenditures, regulatory reform and other
statements contained herein regarding matters that are not historical facts,
are only predictions. No assurance can be given that the future results covered
by the forward-looking statements will be achieved. Such statements are subject
to risks, uncertainties and other factors which could cause actual events or
results to differ materially from future results indicated, expressed or
implied by such forward-looking statements. The most significant of such risks,
uncertainties and other factors are discussed under the heading "Risk Factors"
beginning on page 7 of this Prospectus, and prospective investors are urged to
carefully consider such factors as a result of risks facing the Company.


                                       12
<PAGE>

                                USE OF PROCEEDS

     The net proceeds to the Company from the sale of the Class A Common Stock
in this Offering are estimated to be approximately $70,960,000 ($81,701,500 if
the Underwriters' over-allotment option is exercised in full) based on an
assumed initial public offering price of $14.00 per share and after deduction
of the Underwriters' Discounts and Commissions and estimated expenses payable
by the Company. The Company intends to use substantially all of the net
proceeds from the Offering for capital expenditures relating to its expansion
into new markets. In addition, the Company may use a portion of the proceeds of
the Offering for acquisitions, although the Company is not currently involved
in any acquisition negotiations. Pending such uses, the net proceeds to the
Company will be invested in short-term, investment grade securities. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operation -- Liquidity and Capital Resources."


                                DIVIDEND POLICY

     The Company has not paid any cash dividends on its Common Stock. The
Company intends to retain future earnings, if any, to finance the operation and
expansion of its businesses and, therefore, does not anticipate paying any
dividends on the Common Stock in the foreseeable future.


                                   DILUTION

     As of December 31, 1997, the pro forma net tangible book value of the
Company was $10,756,805 or $0.51 per share of Common Stock. Pro forma net
tangible book value per share represents the Company's net worth divided by
20,930,270 shares of Common Stock outstanding as of December 31, 1997, and
reflects the exchange of a $5.0 million note payable to a stockholder for
480,770 shares of Class B Common Stock in February 1998. See "Capitalization."
After giving effect to the sale by the Company of 5,500,000 shares of Class A
Common Stock pursuant to the Offering (at an assumed initial public offering
price of $14.00 per share) and after deducting the Underwriters' Discounts and
Commissions and estimated expenses of the Offering, the pro forma as adjusted
net tangible book value of the Company at December 31, 1997, was $81,716,805,
or $3.09 per share of Common Stock. Such amount represents an immediate
increase in pro forma net tangible book value of $2.58 per share of Common
Stock to the existing stockholders and an immediate dilution to new investors
of $10.91 per share of Common Stock. The following table illustrates the
dilution in pro forma net tangible book value per share to new investors:


<TABLE>
<S>                                                                                          <C>          <C>
         Assumed initial public offering price ...........................................                 $  14.00
          Pro forma net tangible book value before the Offering ..........................    $  0.51
          Increase in pro forma net tangible book value attributable to net proceeds of
            the Offering .................................................................       2.58
                                                                                              -------
         Pro forma net tangible book value as adjusted for the Offering ..................                     3.09
                                                                                                           --------
         Dilution to new investors .......................................................                 $  10.91
                                                                                                           ========
</TABLE>

     The following table sets forth as of December 31, 1997, on a pro forma as
adjusted basis, the difference between the existing holders of Common Stock and
the purchasers of shares of Class A Common Stock in the Offering, with respect
to the number of shares of Common Stock purchased, the total consideration paid
and the average price per share of Common Stock paid (assuming an initial
public offering price of $14.00 per share):



<TABLE>
<CAPTION>
                                                                            Total
                                           Shares Purchased             Consideration            Average
                                       ------------------------   --------------------------      Price
                                          Number       Percent        Amount        Percent     Per Share
                                       ------------   ---------   --------------   ---------   ----------
<S>                                    <C>            <C>         <C>              <C>         <C>
     Existing stockholders .........   20,930,270        79.2%     $16,330,815        17.5%     $  0.78
     New investors .................    5,500,000        20.8       77,000,000        82.5        14.00
                                       ----------       -----      -----------       -----
        Total ......................   26,430,270       100.0%     $93,330,815       100.0%
                                       ==========       =====      ===========       =====
</TABLE>

     The foregoing tables and discussions exclude shares of Class A Common
Stock issuable upon the exercise of outstanding warrants and options. See
"Management -- Omnibus Stock Plan," "Security Ownership of Management" and
"Notes to Consolidated Financial Statements." To the extent that outstanding
warrants or options are exercised in the future, there will be further dilution
to new investors.


                                       13
<PAGE>

                                CAPITALIZATION

     The following table sets forth certain information with respect to the
cash and cash equivalents and capitalization of the Company as of December 31,
1997. This table should be read in conjunction with the Selected Historical
Consolidated Financial and Operating Data and the audited consolidated
financial statements and notes thereto of US LEC included elsewhere in this
Prospectus. See "Use of Proceeds," "Management's Discussion and Analysis of
Financial Condition and Results of Operations" and "Description of Capital
Stock."



   
<TABLE>
<CAPTION>
                                                                        As of December 31, 1997
                                                        -------------------------------------------------------
                                                                                                 Pro Forma
                                                             Actual        Pro Forma (1)     As Adjusted (1)(2)
                                                        ---------------   ---------------   -------------------
<S>                                                     <C>               <C>               <C>
 Cash and cash equivalents ..........................    $  3,189,210      $  3,189,210        $ 74,149,210
                                                         ============      ============        ============
 Long-term debt (3) .................................    $  5,000,000      $         --        $         --
                                                         ------------      ------------        ------------
 Stockholders' equity:
   Class A Common Stock, $.01 par value, 72,924,728
    shares authorized; 3,855,000 shares issued and
    outstanding, actual; and 9,355,000 shares, as
    adjusted for the Offering (4)(5) ................          38,550            38,550              93,550
   Class B Common Stock, $.01 par value, 17,075,272
    shares authorized; 16,594,500 shares issued and
    outstanding, actual; and 17,075,270 shares issued
    and outstanding, pro forma (4) ..................         165,945           170,753             170,753
   Additional paid-in capital .......................      11,173,420        16,168,612          87,073,612
   Accumulated deficit ..............................      (5,621,110)       (5,621,110)         (5,621,110)
                                                         ------------      ------------        ------------
 Total stockholders' equity .........................       5,756,805        10,756,805          81,716,805
                                                         ------------      ------------        ------------
 Total capitalization ...............................    $ 10,756,805      $ 10,756,805        $ 81,716,805
                                                         ============      ============        ============
</TABLE>
    

- ----------
   
(1) Reflects the exchange of a note payable to a stockholder in the amount of
    $5.0 million for 480,770 shares of Class B Common Stock on February 14,
    1998. See "Certain Relationships and Related Transactions" and Note 9 to
    the Company's consolidated financial statements for the year ended
    December 31, 1997.
    

(2) Adjusted to reflect the sale of Class A Common Stock offered hereby
    assuming no exercise of the Underwriters' over-allotment option and after
    deducting the Underwriters' Discounts and Commissions and estimated
    expenses of the Offering.

(3) Consists of indebtedness to stockholder. See Note 4 to the audited
    consolidated financial statements.

(4) The authorized shares of Class A Common Stock and Class B Common Stock as
    of December 31, 1997 have been adjusted to reflect an amendment to the
    Company's Certificate of Incorporation that decreased the authorized Class
    A Common Stock and increased the authorized Class B Common Stock by
    480,770 shares.

(5) Issued and outstanding Class A Common Stock excludes (i) 182,800 shares
    issuable upon the exercise of outstanding options, none of which are
    vested, (ii) 10,000 shares issuable upon exercise of options to be granted
    upon completion of the Offering, (iii) 469,000 shares issuable upon the
    exercise of outstanding and presently exercisable warrants and (iv)
    16,594,500 (actual) and 17,075,270 (pro forma) shares issuable upon
    conversion of outstanding shares of Class B Common Stock. See "Description
    of Capital Stock."


                                       14
<PAGE>

         SELECTED HISTORICAL CONSOLIDATED FINANCIAL AND OPERATING DATA

     The selected historical consolidated financial data presented below as of
December 31, 1996 and 1997, for the period from June 6, 1996 (inception) to
December 31, 1996 and for the year ended December 31, 1997 are derived from and
qualified by reference to the audited consolidated financial statements and
notes thereto of US LEC contained elsewhere in this Prospectus. The Company's
consolidated financial statements as of December 31, 1996 and 1997, for the
period from June 6, 1996 (inception) to December 31, 1996 and for the year
ended December 31, 1997, have been audited by Deloitte & Touche LLP,
independent public accountants. The selected historical financial data for each
quarter of 1997 have been derived from the unaudited interim consolidated
financial statements of the Company. In the opinion of management, the
unaudited interim consolidated financial statements have been prepared on the
same basis as the audited consolidated financial statements and include all
adjustments, which consist only of normal recurring adjustments, necessary for
a fair presentation of the financial position and the results of operations for
these periods. All of the data should be read in conjunction with and are
qualified by reference to "Management's Discussion and Analysis of Financial
Condition and Results of Operations" and the audited consolidated financial
statements and notes thereto of the Company contained elsewhere in this
Prospectus.



   
<TABLE>
<CAPTION>
                                                  Period from                            Quarter Ended
                                                 June 6, 1996   ---------------------------------------------------------------
                                                (Inception) to
                                                 December 31,      March 31,        June 30,     September 30,    December 31,
                                                     1996             1997            1997            1997            1997
                                               ---------------- --------------- --------------- --------------- ---------------
<S>                                            <C>              <C>             <C>             <C>             <C>
 Statement of Operations Data:
 Revenue .....................................  $          --    $      1,141    $    228,620    $  1,529,745    $   4,698,155
 Cost of services ............................             --         423,093         314,828       1,075,183        2,387,897
                                                -------------    ------------    ------------    ------------    -------------
 Gross margin ................................             --        (421,952)        (86,208)        454,562        2,310,258
 Selling, general and administrative .........        941,743       1,049,130       1,047,940       1,294,115        2,726,152
 Depreciation and amortization ...............          4,059          14,046          88,406         124,994          215,468
                                                -------------    ------------    ------------    ------------    -------------
 Loss from operations ........................       (945,802)     (1,485,128)     (1,222,554)       (964,547)        (631,362)
 Interest expense, net .......................         16,861          66,556         108,021         101,326           78,953
                                                -------------    ------------    ------------    ------------    -------------
 Net loss ....................................  $    (962,663)   $ (1,551,684)   $ (1,330,575)   $ (1,065,873)   $    (710,315)
                                                =============    ============    ============    ============    =============
 Net loss per share ..........................  $        (.06)   $       (.09)   $       (.07)   $       (.06)   $        (.04)
                                                =============    ============    ============    ============    =============
 Weighted average shares outstanding .........     17,310,000      17,310,000      17,832,750      19,075,500       20,239,500
                                                =============    ============    ============    ============    =============
 Other Financial Data:
 Capital expenditures ........................  $     279,634    $  1,798,152    $    634,122    $    828,903    $   9,793,930
 EBITDA (1) ..................................       (941,743)     (1,471,082)     (1,134,148)       (839,553)        (415,894)
 Net cash flow used in operating
  activities .................................     (1,079,069)     (1,043,972)     (1,253,840)     (1,168,631)      (2,127,650)
 Net cash flow provided by (used in)
  investing activities .......................       (465,792)     (1,598,152)     (3,251,162)      1,303,141       (2,405,058)
 Net cash flow provided by financing
  activities .................................      2,271,000       2,400,000       4,848,244       1,335,280        5,424,871
 Operating Data:
 Cumulative Equivalent Access Lines
  in service (2) .............................             --             288           4,087          15,504           49,229
 MOUs (3) ....................................             --          40,000       8,618,000      69,730,000      393,452,000



<CAPTION>
                                                  Year Ended
                                                 December 31,
                                                     1997
                                               ---------------
<S>                                            <C>
 Statement of Operations Data:
 Revenue .....................................  $  6,457,661
 Cost of services ............................     4,201,001
                                                ------------
 Gross margin ................................     2,256,660
 Selling, general and administrative .........     6,117,337
 Depreciation and amortization ...............       442,914
                                                ------------
 Loss from operations ........................    (4,303,591)
 Interest expense, net .......................       354,856
                                                ------------
 Net loss ....................................  $ (4,658,447)
                                                ============
 Net loss per share ..........................  $       (.25)
                                                ============
 Weighted average shares outstanding .........    18,653,308
                                                ============
 Other Financial Data:
 Capital expenditures ........................  $ 13,055,107
 EBITDA (1) ..................................    (3,860,677)
 Net cash flow used in operating
  activities .................................    (5,594,093)
 Net cash flow provided by (used in)
  investing activities .......................    (5,951,231)
 Net cash flow provided by financing
  activities .................................    14,008,395
 Operating Data:
 Cumulative Equivalent Access Lines
  in service (2) .............................        49,229
 MOUs (3) ....................................   471,840,000
</TABLE>
    


<TABLE>
<CAPTION>
                                                        As of                       As of December 31, 1997
                                                     December 31,   -------------------------------------------------------
                                                         1996            Actual        Pro Forma (4)     As Adjusted (4)(5)
                                                    -------------   ---------------   ---------------   -------------------
<S>                                                 <C>             <C>               <C>               <C>
Balance Sheet Data:
Current assets ..................................    $1,067,662      $  9,654,993      $  9,654,993         $80,614,993
Working capital (deficiency) ....................       936,884        (2,268,883)       (2,268,883)         68,691,117
Property and equipment, net .....................       276,097        12,889,335        12,889,335          12,889,335
Total assets ....................................     1,466,835        22,680,681        22,680,681          93,640,681
Notes payable--stockholders .....................     1,671,000         5,000,000                --                  --
Total stockholders' equity (deficiency) .........      (334,943)        5,756,805        10,756,805          81,716,805
</TABLE>

- ----------
(1) EBITDA consists of net earnings (loss) before interest expense, income
    taxes, depreciation and amortization. It is a measure commonly used by
    analysts, investors, and other interested parties in the
    telecommunications industry and is presented to assist in understanding
    the Company's operating results. However,


                                       15
<PAGE>

    EBITDA is not a measurement of financial performance under generally
    accepted accounting principles and should not be considered an alternative
    to net income or loss as a measure of performance or to cash flow as a
    measure of liquidity. EBITDA is not necessarily comparable with similarly
    titled measures for other companies.

(2) As of the end of the period indicated. "Equivalent Access Lines" is a term
    used by management to quantify the size of the Company's network. For a
    detailed definition, see Glossary.

(3) MOUs indicate the number of local and long distance switched minutes of use
    carried over the Company's network during the period indicated.

   
(4) Reflects the exchange of a note payable to a stockholder in the amount of
    $5.0 million for 480,770 shares of Class B Common Stock on February 14,
    1998. See "Certain Relationships and Related Transactions" and Note 9 to
    the Company's consolidated financial statements for the year ended
    December 31, 1997.
    

(5) Adjusted to reflect the sale of Class A Common Stock offered hereby (based
    on an assumed initial public offering price of $14.00 per share) assuming
    no exercise of the Underwriters' over-allotment option and after deducting
    the Underwriters' Discounts and Commissions and estimated expenses of the
    Offering. See "Use of Proceeds."


                                       16
<PAGE>

          MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                           AND RESULTS OF OPERATIONS

Overview

     US LEC is a rapidly growing CLEC that provides switched local, long
distance and enhanced telecommunications services primarily to medium and
large-sized organizations located in selected markets in the southeastern
United States. The Company was founded in June 1996 after passage of the
Telecom Act, which enhanced the competitive environment for local exchange
services. The Company initiated service in Charlotte, North Carolina in March
1997, becoming one of the first CLECs in North Carolina to provide switched
local exchange services, and subsequently initiated service in Raleigh and
Greensboro, North Carolina and in Atlanta, Georgia. As of February 28, 1998,
the Company had 62,545 Equivalent Access Lines in service. US LEC plans to
enter 15 new markets in Tennessee, Florida, South Carolina, Virginia and North
Carolina by the end of 1999.

     Since commencing network operations, US LEC has achieved significant
growth in its Equivalent Access Lines in service and in the number of MOUs
carried over the Company's network. As indicated in the following table, from
March 1997 through February 1998, the Company increased its number of
Equivalent Access Lines in service at month-end from 288 to 62,545 and
increased its monthly number of MOUs during the same period from approximately
40,000 to approximately 450 million:



<TABLE>
<CAPTION>
                                                                          1997
                                  -------------------------------------------------------------------------------------
                                   Mar.   Apr.    May     June    July     Aug.     Sept.     Oct.     Nov.      Dec.
                                  ------ ------ ------- ------- -------- -------- --------- -------- -------- ---------
<S>                               <C>    <C>    <C>     <C>     <C>      <C>      <C>       <C>      <C>      <C>
Cumulative Equivalent
Access Lines in Service (1):
Charlotte .......................  288    757    2,204   2,881    4,571    5,157    9,789    10,863   12,824    16,724
Raleigh .........................   --    168      624   1,206    1,948    3,012    5,715     9,590   13,935    19,017
Greensboro ......................   --     --       --      --       --       --       --        --    3,168    13,488
Atlanta .........................   --     --       --      --       --       --       --        --       --        --
                                   ---    ---    -----   -----    -----    -----    -----    ------   ------    ------
  Totals ........................  288    925    2,828   4,087    6,519    8,169   15,504    20,453   29,927    49,229
                                   ===    ===    =====   =====    =====    =====   ======    ======   ======    ======
MOUs (in thousands) (2) .........   40    500    3,118   5,000   16,323   20,024   33,383    54,273   95,542   243,637
                                   ===    ===    =====   =====   ======   ======   ======    ======   ======   =======



<CAPTION>
                                         1998
                                  -------------------
                                     Jan.      Feb.
                                  --------- ---------
<S>                               <C>       <C>
Cumulative Equivalent
Access Lines in Service (1):
Charlotte .......................   24,943    27,027
Raleigh .........................   19,800    20,685
Greensboro ......................   14,203    14,689
Atlanta .........................       --       144
                                    ------    ------
  Totals ........................   58,946    62,545
                                    ======    ======
MOUs (in thousands) (2) .........  446,386   450,000
                                   =======   =======
</TABLE>

- ----------
(1) As of the end of the month indicated. "Equivalent Access Lines" is a term
    used by management to quantify the size of the Company's network. For a
    detailed description of the manner in which the Company determines its
    Equivalent Access Lines, see the definition of this term in the Glossary
    included as an Annex hereto.

(2) MOUs indicate the number of local and long distance switched minutes of use
    carried over the Company's network during the month indicated.

     The Company's existing North Carolina operations generated positive EBITDA
of $200,264 during the month of December 1997, ten months after the Company
first initiated service in Charlotte. While EBITDA does not represent cash flow
or results of operations in accordance with generally accepted accounting
principles, it is a measure of financial performance commonly used in the
telecommunications industry. Management expects the Company to achieve similar
operating results in each of its new markets within a comparable time frame.
Management attributes US LEC's ability to achieve this performance primarily to
two factors. First, the Company's capital-efficient network strategy eliminates
the lengthly "build-out" period usually required to construct a fiber optic
transmission network, permitting the Company to quickly enter new markets and
rapidly generate revenue and positive cash flow. Second, US LEC's
telecommunications-intensive customers typically transmit a large amount of
switched traffic over the Company's network, resulting in efficient network
utilization and attractive operating margins. See "Risk Factors -- Limited
Operating History," " -- Risks Associated With Implementation of Growth
Strategy" and " -- Negative Cash Flow and Operating Losses."


Factors Affecting Future Operations

     Revenue. The Company's revenue is comprised of monthly recurring charges,
usage charges, and initial, non-recurring charges. Monthly recurring charges
include the fees paid by customers for lines in service and additional features
on those lines. Monthly recurring charges are derived only from end user
customers. Usage charges consist of fees paid by end users for each call made,
fees paid by the ILEC as reciprocal compensation (which results from US LEC
terminating calls made by ILEC customers), and access charges paid by carriers


                                       17
<PAGE>

for long distance traffic originated and terminated by US LEC. Usage charges
are derived from both end user customers and from other carriers. Initial
non-recurring charges are paid by end users, if applicable, for the
installation of service by the Company. See "Risk Factors -- Regulation."

     A majority of the Company's revenue currently consists of reciprocal
compensation. This is the result of an imbalance of inbound and outbound
traffic due to the preponderance of inbound applications utilized by the
Company's customers. Specifically, the Company's customers have been generating
an increasing number of inbound MOUs as the demand for Internet services
continues to grow.

     Reciprocal compensation and carrier access invoices are sent monthly to
the appropriate ILECs and long distance carriers according to standard industry
practices and in standard industry formats. During 1997, BellSouth disputed
that portion of the reciprocal compensation charges billed to it which it
believed was related to Internet access services. Due to uncertainty regarding
the outcome of this dispute, the Company has deferred $1,141,386 of revenue as
of December 31, 1997. See "Risk Factors -- Uncertainties Related to Reciprocal
Compensation" and "Business -- Regulation."

     Cost of Services. Cost of services is currently comprised primarily of
leased transport charges and, to a lesser extent, reciprocal compensation
related to calls that originate with a US LEC customer and terminate on the
network of the ILEC or another CLEC. The Company's leased transport charges are
the lease payments incurred by US LEC for the fiber optic transmission
facilities used to connect the Company's customers to its switch and to connect
to the ILEC and other CLEC networks. The Company's strategy of leasing rather
than building its own fiber transport facilities results in the Company's cost
of services being a significant component of total costs. In addition, the
Company has to date been successful in negotiating lease agreements which
generally match the duration of its customer contracts, thereby allowing the
Company to avoid the risk of continuing expenses associated with transmission
facilities that are not being used by revenue generating customers. While the
majority of the Company's cost of services is comprised of leased transport
charges, management expects that over time outbound traffic and other usage
sensitive charges will become the major component of cost of services as the
Company begins to carry more of its customers' outbound calls.

     Selling, General and Administrative Expenses. The Company's selling,
general and administrative expenses include selling and marketing costs,
customer service, billing, corporate administration, personnel and network
maintenance. Management expects the Company to incur significant selling and
marketing costs as it continues to expand its operations, a significant amount
of which will be incurred in a particular market before the switch becomes
operational and begins to generate revenue. Consequently, selling and marketing
expenses are expected to increase as a percentage of revenue until
implementation of the Company's expansion plan is substantially complete. US
LEC will incur other costs and expenses, including the costs associated with
the maintenance of its networks, administrative overhead, office leases and bad
debts. Management expects that these costs will grow significantly as the
Company expands its operations and that administrative overhead will be a large
portion of these expenses during the start-up phase in each of the Company's
new markets. However, management expects these expenses to become smaller as a
percentage of the Company's revenue as the Company increases its customer base.
 


Results of Operations

     Although US LEC began operations on June 6, 1996, it did not generate
revenue in 1996, and, accordingly, any comparison of operating results between
1996 and 1997 would not be meaningful.

   
     Year Ended December 31, 1997. During the year ended December 31, 1997, the
Company generated $6,457,661 of revenue. Cost of services totaled $4,201,001
and selling, general and administrative expenses during the period were
$6,117,337. Cost of services consisted primarily of leased transport and usage
based charges. Selling, general and administrative expenses were largely
comprised of payroll, selling and marketing costs, rents and professional fees.
 
    

     Depreciation and amortization expense during the period was $442,914,
resulting primarily from network assets placed in service in the Company's
operational markets. Net interest expense for the year ended December 31, 1997
was $354,856, as interest incurred on the Company's borrowings exceeded
interest earned on


                                       18
<PAGE>

   
investments. The Company's net loss for the year ended December 31, 1997
totaled $4,658,447. This was primarily due to the incurrence of operating
expenses prior to realizing any significant revenue, since the Company was
developing its markets during the year.
    

     Period from June 6, 1996 (Inception) to December 31, 1996. During the
period ended December 31, 1996, the Company did not generate operating revenue.
Selling, general and administrative expenses were $941,743 resulting primarily
from payroll costs. The Company's net loss for the period ended December 31,
1996 was $962,663, resulting from operating expenses incurred for the initial
development of the Company's business.


Liquidity and Capital Resources

     The competitive telecommunications services business is capital intensive.
The Company's existing operations have required and will continue to require
substantial capital expenditures for the purchase and installation of network
switches and related electronic equipment in order to provide switch-based
local exchange and long distance services in its markets, and will continue to
require cash to fund operating losses during the start-up phase of each market.
Specifically, the Company estimates that the cash required to fund capital
expenditures for its expansion plans will approximate $40 million and $30
million in 1998 and 1999, respectively. When the Company enters a new market,
the majority of its capital expenditures are related to acquiring and
installing the Lucent 5ESS(R)-2000 switch and paying the associated site
preparation costs (including air conditioning, power supply, backup generators
and fire suppression). Once the Company begins selling services on a particular
switch, there are incremental capital expenditures associated with expanding
the switch, primarily in the form of additional cards. These expenditures are
"success-based" in that they are incurred only in response to customer orders,
thereby ensuring a high level of utilization of the Company's network
infrastructure. The Company's capital expenditure requirements over the next
two years could change materially if the Company places in service
significantly more or significantly fewer access lines than it currently
anticipates.

     In each fiscal quarter since its inception, the Company has generated
negative EBITDA and incurred net losses, although the Company's North Carolina
operations generated positive EBITDA of $200,264 during the month of December
1997. Management attributes the rapid generation of positive EBITDA in these
markets primarily to the Company's switch-based, leased transport network
strategy. Management expects that the Company will generate positive EBITDA on
a consolidated basis in the first quarter of 1998 and that positive cash flow
from existing markets will be greater than the operating losses incurred from
initiating service in new markets thereafter. However, there can be no
assurance that the Company will realize positive consolidated EBITDA or cash
flow in this or future periods. Until sufficient cash flow is generated, the
Company will continue to rely on financing activities for its cash
requirements.

   
     Management expects its available cash, including the net proceeds from the
Offering and operating cash flow, will be sufficient to fund its capital
expenditures and working capital requirements through 1999, although there can
be no assurance that the amount of funds required to complete the Company's
expansion plans through the end of 1999 will not exceed its currently estimated
expenditures. See "Risk Factors -- Negative Cash Flow and Operating Losses" and
" -- Future Capital Requirements." To date, the Company has funded its capital
and liquidity requirements with approximately $11.3 million in cash equity
investments by Messrs. Aab and Ganatra, certain other executive officers and
private investors. In addition, Mr. Aab, Melrich Associates, L.P. (an entity of
which Mr. Aab is a general partner) and Mr. Ganatra have loaned the Company
$8.3 million, of which approximately $5.0 million was advanced in 1996 and 1997
and approximately $3.3 million was advanced in January 1998. These loans are
secured by substantially all of the assets of the Company's operating
subsidiaries in North Carolina and Georgia which, as of December 31, 1997,
represented substantially all of the Company's assets. On February 14, 1998,
Mr. Aab exchanged $5.0 million of these loans for 480,770 shares of Class B
Common Stock. The balance of the loans mature on January 16, 2003, subject to
possible acceleration in the event of a change in control of the Company, and
bear interest, payable quarterly, at an annual rate of 12%. As of December 31,
1997, the Company had cash and cash equivalents of approximately $3.2 million
and $74.1 million on a pro forma basis after giving effect to the Offering. The
Company will continue to evaluate revenue opportunities in other southeastern
markets as well as potential acquisitions, and as attractive opportunities
emerge, the Company may elect to pursue such opportunities. The Company expects
to obtain the capital required to pursue such opportunities from credit
facilities and other borrowings, the sale of additional equity or debt
securities or cash generated from operations. There can be no assurance,
however, that the Company would be successful in raising sufficient additional
capital on acceptable terms or that the Company's operations would
    


                                       19
<PAGE>

produce sufficient positive cash flow to pursue such opportunities should they
arise. Failure to raise and generate sufficient funds or unanticipated
increases in capital requirements may require the Company to delay or curtail
its expansion plans, which could have a material adverse effect on the
Company's growth and its ability to compete in the telecommunications services
industry.


                                   BUSINESS

General

     US LEC is a rapidly growing CLEC that provides switched local, long
distance and enhanced telecommunications services primarily to medium and
large-sized organizations located in selected markets in the southeastern
United States. The Company was founded in June 1996 after passage of the
Telecom Act, which enhanced the competitive environment for local exchange
services. The Company initiated service in Charlotte, North Carolina in March
1997, becoming one of the first CLECs in North Carolina to provide switched
local exchange services, and subsequently initiated service in Raleigh and
Greensboro, North Carolina and in Atlanta, Georgia. As of February 28, 1998,
the Company had 62,545 Equivalent Access Lines in service. US LEC plans to
enter 15 new markets in Tennessee, Florida, South Carolina, Virginia and North
Carolina by the end of 1999.


Market Opportunity

     According to FCC statistics, total revenue from local exchange services in
the United States was approximately $101 billion in 1996. Two years after the
Telecom Act established a competitive framework for local competition, more
than 100 CLECs have raised approximately $14 billion in capital and have signed
2,400 interconnection agreements. Although CLECs as a whole tripled their
customer lines in service in 1997 to 1.5 million, CLECs currently account for
only 2.6% of all local telephone revenues.

     After completing its planned expansion, US LEC will operate in 19 markets
located in six contiguous states in the southeastern United States -- one of
the fastest growing regional markets for business telecommunications services
in the country. Based on the Company's Market Study, in the four markets
presently served by the Company there were approximately 1.4 million business
lines in the four markets presently served by the Company that generated
approximately $2.1 billion in local exchange and long distance revenues in
1996. The Market Study indicates that the 19 markets in which management
expects the Company to be operating by the end of 1999 had a total of
approximately 4.1 million business lines that generated approximately $5.7
billion in local exchange and long distance revenues in 1996. These local and
long distance revenue figures do not include revenues associated with enhanced
services and carrier access fees, which US LEC is pursuing as part of its
business plan. The table below sets forth certain information from the Market
Study regarding the markets in which US LEC currently operates and the markets
it plans to enter by the end of 1999.


                                       20
<PAGE>


<TABLE>
<CAPTION>
                                                                               1996 Market Data
                                                            -------------------------------------------------------
                                                                                        Revenue ($) (millions)
                                                                Number of      ---------------------------------------
                                          Launch Period      Business Lines     Local     Long Distance      Total
                                       ------------------   ----------------   -------   ---------------   --------
                                                               (thousands)
<S>                                    <C>                  <C>                <C>       <C>               <C>
 Current Markets:
   Charlotte, NC ...................      March 1997                203           119           186           305
   Raleigh, NC .....................      April 1997                196           115           180           295
   Greensboro, NC ..................     October 1997               138            81           127           208
   Atlanta, GA .....................     February 1998              847           497           777         1,274
                                                                    ---           ---           ---         -----
    Subtotal .......................                              1,384           812         1,270         2,082
 Planned Markets:
 Tennessee
   Memphis .........................   2nd Quarter 1998             192           102           160           262
   Knoxville .......................   2nd Quarter 1998              72            39            60            99
   Nashville .......................   2nd Quarter 1998             155            83           129           212
 Florida
   Orlando .........................   3rd Quarter 1998             355           170           266           436
   Miami ...........................   3rd Quarter 1998             482           219           343           562
   Tampa ...........................   4th Quarter 1998             421           208           325           533
   Ft. Lauderdale ..................   4th Quarter 1998             329           150           234           384
   Jacksonville ....................   1st Quarter 1999             187            85           133           218
 South Carolina
   Charleston/Myrtle Beach .........   1st Quarter 1999              90            59            93           152
   Greenville/Spartanburg ..........   1st Quarter 1999              96            62            97           159
   Columbia ........................   3rd Quarter 1999              95            62            96           158
 Virginia
   Richmond ........................   2nd Quarter 1999             154            91           142           233
   Roanoke .........................   2nd Quarter 1999              46            27            42            69
 North Carolina
   Wilmington ......................   3rd Quarter 1999              35            21            32            53
   Asheville .......................   4th Quarter 1999              29            17            27            44
                                                                  -----           ---         -----         -----
    Subtotal .......................                              2,738         1,395         2,179         3,574
                                                                  -----         -----         -----         -----
      Total ........................                              4,122         2,207         3,449         5,656
                                                                  =====         =====         =====         =====
</TABLE>

Business Strategy

     US LEC's objective is to become the primary provider of switched local
telecommunications services to its existing and target customers. The principal
elements of US LEC's strategy include:

o Deploy a Capital-Efficient Network. Management believes that US LEC is one of
  the first CLECs to utilize a strategy of purchasing and deploying switching
  equipment in each target market and leasing the required fiber optic
  transmission capacity from CAPs, other CLECs and ILECs. Management believes
  the Company's switch-based, leased-transport strategy enables it to enter
  markets and generate revenue and positive cash flow more rapidly than if the
  Company first constructed its own transmission facilities. This strategy
  also reduces the up-front capital expenditures required to enter new markets
  and avoids the risk of "stranded" investment in under-utilized fiber
  networks. Management also believes that the Company's ability to align its
  leased transmission costs with customer orders permits a higher return on
  invested capital.

o Focus on a Southeastern Cluster of Operations. After completing its planned
  expansion, the Company will operate in 19 markets located in six contiguous
  states in the southeastern United States -- one of the fastest growing
  regional markets for business telecommunications services in the country.
  Within the Southeast, the Company has selected its target markets based on a
  number of considerations, including the number of potential customers and
  other competitors in such markets and the presence of multiple transmission
  facility suppliers. Management believes that the Company's clustered network
  will enable it to take advantage of regional


                                       21
<PAGE>

  calling patterns and capture an increasing portion of customer traffic on its
  network. Management also believes that by originating and terminating calls on
  its network, the Company can achieve significant cost savings and potential
  pricing advantages over its competition.

o Target Telecommunications-Intensive Customers. The Company focuses its
  primary sales efforts on telecommunications-intensive organizations with at
  least 100 access lines, including businesses, government agencies, other
  telecommunications companies and VARs. The volume of usage generated by the
  Company's target customers allows the Company to efficiently concentrate the
  telecommunications traffic of its customers on one or more leased T-1 lines.
  In addition, the Company frequently is able to sell enhanced and long distance
  services to complement its core local services. This further enhances network
  utilization and thereby improves margins, as fixed network costs are spread
  over a larger base of MOUs.

o Install a Robust, Uniform Technology Platform. The Company has chosen the
  5ESS(R)-2000 digital switch manufactured by Lucent to provide a consistent
  technology platform throughout its network. The Lucent switch enables the
  Company to provide both local and long distance services from a single
  platform. This uniform and advanced switching platform will enable the
  Company to (i) deploy features and functions quickly throughout its entire
  network, (ii) expand switch capacity in a cost effective manner, (iii) lower
  maintenance costs through reduced training and spare part requirements and
  (iv) achieve direct connectivity to cellular and personal communication
  system applications in the future.

o Employ a Direct Sales Force with Extensive Local Market Experience.
  Management believes that the Company's success in a particular market is
  enhanced by employing a direct sales force with extensive local market and
  telecommunications sales experience. The Company employed this strategy in
  building its existing sales forces in North Carolina and Georgia and intends
  to continue implementing this strategy in other markets. Salespeople with
  experience in a particular market provide the Company with extensive
  knowledge of the Company's target customer base and in many cases already
  have existing relationships with target customers. The experience and
  relationships of these salespeople enable them to pre-sell the Company's
  products and services prior to initiating network operations in a particular
  market.

o Implement Efficient Provisioning Processes. Management believes that a
  critical aspect of the success of a CLEC is timely and effective
  provisioning systems, which includes the process of transitioning ILEC
  customers to the Company's network. The Company focuses on implementing
  effective and timely provisioning practices in each of its markets to
  rapidly and efficiently transition customers from the ILEC to the Company
  without disruption of the customer's operations. Management believes that
  these practices provide the Company with a long-term competitive advantage
  and enable it to implement services in its markets rapidly and to shorten
  the time between receipt of the customer order and the generation of
  revenue.


US LEC's Network

     After completing its planned expansion, the Company will operate in 19
markets located in six contiguous states in the southeastern United States --
one of the fastest growing regional markets for business telecommunications
services in the country. Within the Southeast, the Company has selected its
target markets based on a number of considerations, including the number of
potential customers and other competitors in such markets and the presence of
multiple transmission facility suppliers. Management believes that the
Company's clustered network will enable it to take advantage of regional
calling patterns and capture an increasing portion of customer traffic on its
network. Management also believes that by originating and terminating calls on
its network, the Company can achieve significant cost savings and potential
pricing advantages over its competition.

     US LEC purchases and deploys switching equipment and leases fiber optic
transmission capacity from CAPS, other CLECs and ILECs. Management believes
that this switch-based, leased-transport strategy provides the Company with
significant competitive advantages. By owning its switches, the Company is able
to better configure its network to provide cost-effective and customized
solutions for its customers' telecommunications needs. By leasing transmission
capacity, the Company is able to (i) reduce the up-front capital expenditures
required to enter new markets, (ii) avoid the risk of "stranded" investment in
under-utilized fiber networks and (iii) enter markets and generate revenue and
positive cash flow more rapidly than if the Company constructed its own
transmission facilities. Management believes that the availability of several
suppliers of fiber optic transmission facilities in each of the Company's
markets provides US LEC with negotiating leverage, vendor diversity and the
ability to offer customers enhanced reliability at a competitive price.


                                       22
<PAGE>

     US LEC provides its customers with inbound and outbound telecommunications
services over its switch-based, leased-transport network. Calls originating
with a US LEC customer are transported over leased lines to the US LEC switch
and can either be terminated directly on the Company's network or they can be
routed to a long distance carrier, the ILEC or another CLEC, depending on the
location of the call recipient. Similarly, calls originating from the public
switched telephone network and destined for a US LEC customer are routed
through the US LEC switch and delivered to call recipients via leased
transmission facilities. A diagram of the Company's typical network layout is
presented in the following figure:

(Graphic appears here with the following information:

Off-Net Customer

Lead Transport From ILEC

On-Net Customer

SONET Ring Fiber Transport Leased From CAP

US LEC logo

ILEC Central Office

ILEC Access Tandem

IXC

Public Switched Telephone Network


                                       23
<PAGE>

     Uniform Technology Platform. The Company is implementing a consistent
technology platform based on the Lucent 5ESS(R)-2000 digital switch throughout
its network. Unlike traditional long distance or local switches deployed by
many of the Company's competitors, the Lucent switch enables the Company to
provide local and long distance services from a single platform. This uniform
and advanced switch platform enables the Company to (i) deploy features and
functions quickly in all of its networks, (ii) expand switch capacity in a cost
effective manner and (iii) lower maintenance costs through reduced training and
spare parts requirements. In addition, the scalability and capacity of the
Lucent switches enable the Company to accommodate the increased volume of
on-net traffic that is anticipated to result from the Company's clustered
network strategy and will facilitate direct connectivity to cellular and
personal communication system applications in the future.

     Leasing of Transmission Capacity. As part of its capital efficient network
structure, the Company's transmission facilities are leased from CAPs, other
CLECs and ILECs. In general, US LEC seeks to lease fiber optic transmission
facilities from multiple sources in each of its current and target markets.
Management believes that this type of broad coverage of the markets in which it
operates results in the following advantages:

   o an increased number of buildings that can be directly connected to the
     Company's switching network, which should maximize the number of customers
     to which the Company can offer its services;

   o a higher volume of telecommunications traffic both originating and
     terminating on the Company's network, which should result in improved
     operating margins;

   o enhanced reliability at competitive prices;

   o the ability to leverage its investment in high capacity switching
equipment and electronics; and

   o the opportunity for the Company's network to provide backhaul carriage
     for other telecommunications service providers, such as long distance and
     wireless carriers.

     Interconnection. The Company has executed interconnection agreements for
all of its current operating networks: in North Carolina, with BellSouth (which
expires in November 1998), GTE (which expires in March 1999) and Sprint (which
expires in October 1999), and in Georgia, with BellSouth (which expires in
November 1998). The agreement with BellSouth covers all states within
BellSouth's operating territory. The Company is currently negotiating
interconnection agreements with GTE and Sprint for Florida. Furthermore, the
Company is currently negotiating a new interconnection agreement with
BellSouth, which will have a term of three years. In addition, the Company
believes that interconnection arrangements between the ILECs and other CLECs or
the Company will be in place in other markets that the Company may enter.
Interconnection agreements between the Company (or other CLECs) and ILECs are
subject to approval of the relevant PUC, and under the terms of the Telecom
Act, each ILEC which is subject to the Telecom Act is required to negotiate an
interconnection agreement with the Company (and with other CLECs). See
"Business -- Regulation." Where an interconnection agreement cannot be reached
on terms and conditions satisfactory to the Company, the Company may pursue
binding arbitration of any disputes before the state utility commissions as
provided under the Telecom Act. There can be no assurance, however, that the
Company will be able to negotiate interconnection agreements on terms and
conditions satisfactory to the Company or to renew existing interconnection
agreements as they expire. However, a decision by the United States Court of
Appeals for the Eighth Circuit vacating several of the FCC's rules creates
uncertainty about the rules governing pricing, terms and conditions of
interconnection agreements. As a result of this decision, which has been
appealed to the Supreme Court, and a pending review of this issue by the FCC,
negotiation and enforcement of such agreements could become more difficult and
protracted, and renegotiation of existing agreements could be required.


Products and Services

     The Company's products and services are designed to appeal to the
sophisticated telecommunications needs of its target customers.

     Local Services. The Company provides local dial-tone services to
customers, which allows them to complete calls in a free calling area and to
access a long distance calling area. Local services and long distance services
can be bundled together using the same transport facility. The Company's
network is designed to allow a


                                       24
<PAGE>

customer to easily increase or decrease capacity and alter enhanced services as
the telecommunications requirements of the business change. In addition to its
core local services, the Company also provides access to third party directory
assistance and operator services.

     Long Distance Services. US LEC provides domestic and international long
distance services for completing intrastate, interstate and international
calls. Long distance service is offered as an additional service to the
Company's local exchange customers. Long distance calls which do not terminate
on the Company's network are passed to long distance carriers which route the
remaining portion of the call. The Company's ability to integrate local and
long distance services allows it to aggregate customers' monthly recurring,
local usage and long distance charges on a single, consolidated invoice.

     Enhanced Services. In addition to providing typical enhanced services such
as voicemail, call transfer and conference calling, US LEC offers additional
value-added enhanced services to complement its core local and long distance
services. These enhanced service offerings include:

        o Access to Internet Services -- Enables customers to use their
          available capacity for access to ISPs.

        o Data Networking Services -- The Company can provide high-speed,
          broadband services to use for data and internet access such as
          Integrated Services Digital Network (ISDN) and Primary Rate
          Interface (PRI).

        o Specialized Application Services -- The Company can create products
          and services that are tailored for target industries with special
          telecommunications needs such as the hospitality industry. These
          services typically include non-measured rate local calling, expanded
          local calling area, discounted long distance rates and tailored
          trunking configurations.


Sales and Marketing

     Sales. US LEC is building a highly motivated and experienced direct sales
force. The Company recruits salespeople with strong sales backgrounds in its
existing and target markets, including salespeople from long distance
companies, telecommunications equipment manufacturers, network systems
integrators and ILECs. The Company expanded its sales force from four
salespeople at December 31, 1996 to 23 salespeople at December 31, 1997, and
management expects to further increase the Company's sales force to over 100
salespeople by the end of 1998. The Company plans to continue to attract and
retain highly qualified salespeople by offering them an opportunity to work
with an experienced management team in an entreprenurial environment and to
participate in the potential economic rewards made available through a
results-oriented compensation program that emphasizes sales commissions.

     During the months prior to initiating service in a new market, the
Company's salespeople begin pre-selling the Company's services to target
customers. This pre-selling effort is designed to shorten the period between
the availability of service and the receipt of a customer order and to generate
customers in each market who may enter into service agreements before the local
US LEC network becomes operational.

     The Company also retains an independent sales agent to identify ISPs and
other potential users of the Company's services. If one of these potential
users becomes a US LEC customer, the Company pays the sales agent a commission
based on the reciprocal compensation that US LEC receives from traffic
terminated to that customer.

     Marketing. In its existing markets, US LEC seeks to position itself as a
high quality alternative to ILECs for local telecommunication services by
offering network reliability and superior customer support at competitive
prices. The Company intends to build its reputation and brand identity by
working closely with its customers to develop services tailored to their
particular needs and by implementing targeted advertising and promotional
efforts, which will be gradually expanding to mass media.

     Customer Service. Management believes that the Company's ability to
provide superior customer service is a key factor in acquiring new customers
and reducing churn of existing customers. The Company has developed a customer
service strategy that is designed to effectively meet the service requirements
of its target customers. The principal salesperson for each customer provides
the first line of customer service by identifying and resolving any customer
concerns. An account development representative is assigned to each customer to
supervise all


                                       25
<PAGE>

aspects of customer relations, including account collections and complaint
resolution, and to provide a single point of contact for all customer service
issues. The Company also employs a staff of locally-based customer service
representatives who efficiently provide real time problem identification and
resolution and superior customer service.

     Billing. US LEC outsources the preparation of customer bills, which are
available in a variety of formats that can be tailored to a customer's specific
needs. For example, the Company can provide account codes that enable a
customer to track expenses by employee, department or division. Codes also can
be used to restrict calling by individuals to help the customer manage costs.
The Company plans to implement an internal computerized billing system during
the second quarter of 1998 that is expected to enhance flexibility and reduce
costs associated with the billing function.


Regulation

     The following summary of regulatory developments and legislation does not
purport to describe all present and proposed federal, state and local
regulations and legislation affecting the telecommunications industry. Other
existing federal and state legislation and regulations are currently the
subject of judicial proceedings, legislative hearings and administrative
proposals which could change, in varying degrees, the manner in which this
industry operates. Neither the outcome of these proceedings, nor their impact
upon the telecommunications industry or the Company, can be predicted at this
time. This section also sets forth a brief description of regulatory and tariff
issues pertaining to the operation of the Company.

     Overview. The Company's services are subject to varying degrees of
federal, state and local regulation. The FCC generally exercises jurisdiction
over the facilities of, and services offered by, telecommunications common
carriers that provide interstate or international communications. The state
regulatory commissions retain jurisdiction over the same facilities and
services to the extent they are used to provide intrastate communications.

     Federal Legislation. The Company must comply with the requirements of
common carriage under the Communications Act of 1934, as amended (the
"Communications Act"). The Telecom Act, enacted on February 8, 1996,
substantially revised the Communications Act. The Telecom Act establishes a
regulatory framework for the introduction of local competition throughout the
United States and is intended to reduce unnecessary regulation to the greatest
extent possible. Among other things, the Telecom Act preempts, after notice and
an opportunity for comment, any state or local government from prohibiting any
entity from providing telecommunications service. This provision invalidated
prohibitions on entry found in almost half of the states in the country at the
time the Telecom Act was passed.

     The Telecom Act also establishes a dual federal-state regulatory scheme
for eliminating other barriers to competition faced by competitors to the ILECs
and other new entrants into the local telephone market. Specifically, the
Telecom Act imposes on ILECs certain interconnection obligations, some of which
are to be implemented by FCC regulations. The Telecom Act contemplates that
states will apply the federal regulations and oversee the implementation of all
aspects of interconnection not subject to FCC jurisdiction as they oversee
interconnection negotiations between ILECs and their new competitors.

     The FCC has significant responsibility in the manner in which the Telecom
Act will be implemented especially in the areas of universal service, access
charges and price caps. The details of the rules adopted by the FCC will have a
significant effect in determining the extent to which barriers to competition
in local services are removed, as well as the time frame within which such
barriers are eliminated.

     The state PUCs have an even more significant responsibility in
implementing the Telecom Act. Specifically, the states have authority to
establish interconnection pricing, including unbundled loop charges, reciprocal
compensation and wholesale pricing. The states are also charged under the
Telecom Act with overseeing the arbitration process for resolving
interconnection negotiation disputes between CLECs and the ILECs and must
approve interconnection agreements. See " --  BellSouth North Carolina PUC
Proceeding" for a discussion of the Company's action before the North Carolina
PUC related to its interconnection agreement with BellSouth.

     The Telecom Act imposes on ILECs certain interconnection obligations that,
taken together, grant competitive entrants such as the Company what is commonly
referred to as "co-carrier status." It is anticipated that co-carrier status
and the preemption of state and local prohibitions on entry could permit the
Company to become a full service provider of switched telecommunications
services anywhere in the United States. The following


                                       26
<PAGE>

table summarizes the interconnection rights granted by the Telecom Act that are
most important to the achievement of the Company's goals and the Company's
belief as to the anticipated effect of the new requirements, if implemented in
the manner in which the Company believes Congress intended. There can be no
assurance that these statutory provisions will be implemented in this fashion
due to the currently-pending appeals of the FCC's implementing rules and court
decisions regarding those rules.




<TABLE>
<CAPTION>
Issue                  Definition                                        Anticipated Effect
- --------------------   -----------------------------------------------   ---------------------------------------------
<S>                    <C>                                               <C>
Interconnection        Efficient network interconnection, through        Allows a CLEC to service and terminate calls
                       physical or virtual co-location or purchase       to and from customers connected to other
                       of network elements to transfer calls back        networks
                       and forth between ILECs and competitive
                       networks (including 911, 0 +, directory assis-
                       tance, etc.)
Local Loop             Allows competitors to selectively gain access     Reduces the capital and operating costs of a
 Unbundling            to ILEC wires which connect ILEC central          CLEC to serve customers not directly con-
                       offices with customer premises or CLEC's          nected to its networks
                       central office (if applicable)
Reciprocal             Mandates payment for local traffic exchanges      Enables CLECs to recover cost of terminat-
 Compensation          between ILECs and competitors                     ing ILEC-originated traffic
Number Portability     Allows customers to change local carriers         Allows customers to switch to a CLEC's local
                       without changing numbers; true portability        service without changing phone numbers
                       allows incoming calls to be routed directly
                       to a competitor. Interim portability allows
                       incoming calls to be routed through the ILEC
                       to a competitor at the economic equivalent
                       of true portability
Dialing Parity         Allows customers to access CLEC without           Allows customers to access CLEC on same
                       dialing access codes                              basis as ILEC
Access to Phone        Mandates assignment of new telephone num-         Allows CLECs to provide telephone num-
 Numbers               bers to competitive telecommunications pro-       bers to new customers on the same basis as
                       vider's customers on non-discriminatory terms     the ILEC
Resale                 ILECs must establish wholesale rates for the      Promotes resale activities by CLECs
                       services they offer at retail
</TABLE>

     The Company expects to receive a significant portion of its initial
revenue in a given market from the ILEC in the form of reciprocal compensation
payments due to the Company's ESP and ISP customers receiving more calls than
they make. Several ILECs have challenged the applicability of the reciprocal
compensation scheme to ISP traffic. For a discussion see " -- State Regulation"
and " -- BellSouth North Carolina PUC Proceeding."

     Certain of the obligations in the table above, including the obligations
to establish number portability, dialing parity and reciprocal compensation
arrangements, and to provide non-discriminatory access to telephone poles,
ducts, conduits and rights-of-way also apply to CLECs, including the Company.
As a result of the Telecom Act's applicability to other telecommunications
carriers, it may provide the Company with the ability to reduce its own
interconnection costs by interconnecting directly with non-ILECs, but may also
cause the Company to incur additional administrative and regulatory expenses in
responding to interconnection requests. At the same time, the Telecom Act also
makes competitive entry into other service or geographic markets more
attractive to RBOCs, other ILECs, long distance carriers and other companies
and likely will increase the level of competition the Company faces.

     In addition, the Telecom Act, as passed, provided that ILECs that are
subsidiaries of RBOCs could not offer in-region, long distance services across
LATAs until they had demonstrated that (i) they have entered into an


                                       27
<PAGE>

approved interconnection agreement with a facilities-based CLEC or that no such
CLEC has requested interconnection as of a statutorily determined deadline,
(ii) they have satisfied a 14-element checklist designed to ensure that the
ILEC is offering access and interconnection to all local exchange carriers on
competitive terms and (iii) the FCC has determined that in-region, inter-LATA
approval is consistent with the public interest, convenience and necessity.
Recently, a U.S. District Court ruled that these RBOC-specific provisions were
unconstitutional. See " -- U.S. District Court Decision."

     Federal Regulation and Related Proceedings. The Telecom Act gives the FCC
the authority to forebear from regulating companies if it finds such regulation
does not serve the public interest, and directs the FCC to review its
regulations for continued relevance on a regular basis. As a result of this
directive, a number of the regulations that historically applied to CLECs have
been and may continue to be eliminated in the future. While it is therefore
expected that a number of regulations that were developed prior to the Telecom
Act will be eliminated in time, those which apply to the Company at present are
discussed below. Pursuant to its authority to forebear, the FCC has adopted
orders eliminating tariff filing requirements for non-dominant carriers
providing interstate access and domestic interstate long distance services.
However, on February 13, 1997, the United States Court of Appeals for the
District of Columbia granted motions for stay of the FCC order detariffing
domestic interstate long distance service pending judicial review of that
order. The result of this stay is that carriers must continue to file tariffs
for interstate long distance services. Tariff filing requirements remain in
place for international traffic. US LEC has filed federal interstate long
distance, interstate access and international tariffs.

     In addition to its forbearance activities, the FCC also has proposed
reducing the level of regulation that applies to the ILECs, and increasing
their ability to respond quickly to competition from the Company and others.
For example, in accordance with the Telecom Act, the FCC has applied
"streamlined" tariff regulation to the ILECs, which greatly accelerates the
time prior to which changes to tariffed service rates may take effect, and has
eliminated the requirement that ILECs obtain FCC authorization before
constructing new domestic facilities. These actions will allow ILECs to change
service rates more quickly in response to competition. Similarly, the FCC has
proposed affording significant new pricing flexibility to ILECs subject to
price cap regulation. To the extent such increased pricing flexibility is
provided, the Company's ability to compete with ILECs for certain service may
be adversely affected. In addition, a U.S. District Court in Texas recently
invalidated certain provisions of the Telecom Act which prohibited the RBOCs
from engaging in certain manufacturing and marketing activities and conditioned
RBOC provision of in-region long distance service upon a demonstration that the
local market had been opened to competition. This decision has been stayed, and
has been appealed to the United States Court of Appeals for the Fifth Circuit.
See " -- U.S. District Court Decision."

     The FCC has taken several actions related to the assignment of telephone
numbers, first in July 1995 mandating the responsibility for administering and
assigning local telephone numbers be transferred from the RBOCs and a few other
ILECs to a neutral entity, and second in July 1996 adopting a regulatory
structure under which a wide range of number portability issues would be
resolved. In March 1997, the FCC affirmed its number portability rules, but it
extended slightly certain deadlines for the implementation of true number
portability. The FCC plans to establish cost recovery rules for long-term
number portability.

     On August 8, 1996, the FCC issued an order containing rules providing
guidance to the ILECs, CLECs, long distance companies and state PUCs regarding
several provisions of the Telecom Act. The rules include, among other things,
FCC guidance on: (i) discounts for end-to-end resale of ILEC retail local
exchange services (which the FCC has suggested should be in the range of
17%-25%); (ii) availability of unbundled local loops and other unbundled ILEC
network elements; (iii) the use of Total Element Long Run Incremental Costs in
the pricing of these unbundled network elements; (iv) average default proxy
prices for unbundled local loops in each state; (v) mutual compensation proxy
rates for termination of ILEC/CLEC local calls; and (vi) the ability of CLECs
and other interconnectors to opt into portions of previously-approved
interconnection agreements negotiated by the ILECs with other parties on a most
favored nation (or a "pick and choose") basis. See " -- Eighth Circuit Court of
Appeals Decision" for a discussion of the Eighth Circuit Court of Appeals
decision invalidating several pertinent aspects of this August 8 order.

     On May 8, 1997, the FCC released an order establishing a significantly
expanded federal universal service program which subsidized certain eligible
services. For example, the FCC established new subsidies for services provided
to qualifying schools and libraries with an annual cap of $2.25 billion and for
services provided to rural


                                       28
<PAGE>

health care providers with an annual cap of $400 million. The FCC also expanded
the federal subsidies to low-income consumers and consumers in high-cost areas.
Providers of interstate telecommunications service, such as the Company, as
well as certain other entities, must pay for these programs. The Company's
share of the schools, libraries and rural health care funds will be based on
its share of the total industry telecommunications service and certain defined
telecommunications end user revenues. The Company's share of all other federal
subsidy funds will be based on its share of the total interstate
telecommunications service and certain defined telecommunications end user
revenues. As of December 31, 1997, the Company was unable to quantify the
payments, if any, that it will be required to make for the year. Based upon
preliminary guidance provided by the FCC regarding the calculation of these
payments, management believes that the amount of any such payments will not be
material for 1997. In the May 8 order, the FCC also announced that it will soon
revise its rules for subsidizing service provided to consumers in high cost
areas. Several parties have appealed the May 8 order. Such appeals have been
consolidated and transferred to the United States Court of Appeals for the
Fifth Circuit where they are currently pending. In addition, on July 3, 1997,
several ILECs filed a petition for stay of the May 8 order with the FCC. That
petition is also pending.

     In a combined Report and Order and Notice of Proposed Rulemaking released
on December 24, 1996, the FCC made changes and proposed further changes in the
interstate access charge structure. In the Report and Order, the FCC removed
restrictions on an ILEC's ability to lower access prices and relaxed the
regulation of new switched access services in those markets where there are
other providers of access services. If this increased pricing flexibility is
not effectively monitored by federal regulators, it could have a material
adverse effect on the Company's ability to compete in providing interstate
access services. On May 16, 1997, the FCC released an order revising its access
charge rate structure. The new rules substantially increase the costs that
ILECs subject to the FCC's price cap rules ("price cap LECs") recover through
monthly, non-traffic sensitive access charges and substantially decrease the
costs that price cap LECs recover through traffic sensitive access charges. In
the May 16 order, the FCC also announced its plan to bring interstate access
rate levels more in line with cost. The plan will include rules to be
established sometime this year that grant price cap LECs increased pricing
flexibility upon demonstrations of increased competition (or potential
competition) in relevant markets. The manner in which the FCC implements this
approach to lowering access charge levels will have a material effect on the
Company's ability to compete in providing interstate access services. Several
parties have appealed the May 16 order. Those appeals have been consolidated
and transferred to the United States Court of Appeals for the Eighth Circuit
where they are currently pending.

     As part of its overall plan to lower interstate access rates, the FCC also
released an order on May 21, 1997, in which the FCC revised its price cap
rules. In the May 21 order, the FCC increased the so-called X-Factor (the
percentage by which price cap LECs must lower their interstate access charges
every year, net of inflation and exogenous cost increases) and made it uniform
for all price cap LECs. The results of these rule changes will be both a
one-time overall reduction in price cap ILEC interstate access charges and an
increase in the rate at which those charges will be reduced in the future.
Several parties have appealed the May 21 order. Those appeals were consolidated
and transferred to the United States Court of Appeals for the Tenth Circuit.
They have been subsequently transferred to the United States Court of Appeals
for the District of Columbia where they are currently pending.

     The Company anticipates that the FCC will initiate a number of additional
proceedings, of its own volition and as a result of requests from CLECs and
others, as a result of the Telecom Act. While the Eighth Circuit's decision in
the appeal of the August 8, 1996 order limits the FCC's jurisdiction over the
local competition provisions of the Telecom Act and while the decision of the
U.S. District Court for the Northern District of Texas has held that the
RBOC-specific provisions of the Telecom Act are unconstitutional and this issue
has been raised in other proceedings (see above and below), such proceedings
may nonetheless further define and construe the Telecom Act's terms.

     The FCC also requires carriers to file periodic reports concerning
carriers interstate circuits and deployment of network facilities. The FCC
generally does not exercise direct oversight over cost justification and the
level of charges for services of non-dominant carriers, although it has the
power to do so. The FCC also imposes prior approval requirements on transfers
of control and assignments of operating authorizations. The FCC has the
authority to generally condition, modify, cancel, terminate, or revoke
operating authority for failure to comply with federal laws or rules,
regulations and policies of the FCC. Fines or other penalties also may be
imposed for


                                       29
<PAGE>

such violations. There can be no assurance that the FCC or third parties will
not raise issues with regard to the Company's compliance with applicable laws
and regulations.

     Eighth Circuit Court of Appeals Decision. Various parties, including ILECs
and state PUCs, requested that the FCC reconsider its own rules and/or filed
appeals of the FCC's August 8, 1996 order in various U.S. Courts of Appeal.
Also, several parties petitioned the FCC and the courts to stay the
effectiveness of the FCC's rules included in the FCC's order, pending a ruling
on the appeals. The appeals were consolidated and transferred to the U.S. Court
of Appeals for the Eighth Circuit.

     On July 18, 1997, the Eighth Circuit overturned the pricing rules
established in the August 8, 1996 order, except those applicable to commercial
mobile radio service providers. The Eighth Circuit held that, in general, the
FCC does not have jurisdiction over prices for interconnection, resale, leased
unbundled network elements and traffic termination. The Eighth Circuit also
overturned the FCC's "pick and choose" rules as well as certain other FCC rules
implementing the Telecom Act's local competition provisions. In addition, the
Eighth Circuit decision substantially limits the FCC's authority to enforce the
local competition provisions of the Telecom Act. The FCC and others have
appealed the Eight Circuit decision to the U.S. Supreme Court, and the U.S.
Supreme Court granted certiorari on January 26, 1998.

     In the short term, management believes that the Eighth Circuit decision
will not have a material adverse effect on the Company, because it already has
interconnection agreements in place, or expects to have such agreements in
place, under the provisions of the FCC's order and the Telecom Act which were
not invalidated by the Court. The decision does not delay the implementation of
the Telecom Act by the parties and by the state PUCs, but rather eliminates the
guidance on pricing and most favored nation procedures as well as other issues
that the FCC sought to provide to the parties and the state PUCs. However,
since the Eighth Circuit decision creates uncertainty about the rules governing
pricing, terms and conditions of interconnection agreements, it could make
negotiation and enforcement of such agreements more difficult and protracted,
and may require renegotiation of existing agreements. In the long term, the
Eighth Circuit's decision makes it more likely that the rules governing local
competition will vary from state to state. Most states have already begun to
establish rules for local competition that are consistent with the FCC rules
overturned by the Eighth Circuit. If a patchwork of state regulations were to
develop, it could increase the Company's costs of regulatory compliance and
could make competitive entry in some markets more difficult and expensive than
in others.

     U.S. District Court Decision. On July 2, 1997, SBC and its local exchange
carrier subsidiaries filed a lawsuit in the United States District Court for
the Northern District of Texas challenging on U.S. Constitutional grounds the
Telecom Act restrictions applicable to the RBOCs only. The plaintiffs in the
case sought both a declaratory judgment and an injunction against the
enforcement of the challenged provisions. On December 31, 1997, this U.S.
District Court ruled that Sections 271-275 of the Telecom Act were
unconstitutional on the grounds that these sections constituted a "bill of
attainder." Based on this U.S. District Court ruling, the RBOCs that are
parties to this proceeding could technically re-enter the inter-LATA long
distance market immediately. The FCC and long distance carriers requested a
stay of the decision, which has been granted. The decision of the U.S. District
Court has been appealed to the U.S. Court of Appeals for the Fifth Circuit, and
the resulting decision could be appealed to the U.S. Supreme Court. In
addition, BellSouth has appealed to the U.S. Court of Appeals for the D.C.
Circuit the FCC's prior decisions denying BellSouth's applications to provide
in-region long distance service in South Carolina and Louisiana. BellSouth
challenged the decisions on the same grounds on which SBC challenged Sections
271-275 of the Telecom Act. On January 14, 1998, the North Carolina PUC gave
BellSouth approval to file with the FCC to provide long distance services in
North Carolina, provided it first improves its operating support systems and
performance measures.


                                       30
<PAGE>

State Regulation. The Company is certified by the appropriate state PUCs as
                                   follows:




<TABLE>
<CAPTION>
      State              Order Dated                            Telecommunication Services
- -----------------   --------------------   --------------------------------------------------------------------
<S>                 <C>                    <C>
  North Carolina    September 27, 1996     local exchange, exchange access, and intrastate interexchange long
                                           distance
       Georgia        August 5, 1997/      local exchange (interim) and long distance (interim) and intrastate
                     February 3, 1998      interexchange alternate operator services (interim)
      Virginia       September 8, 1997     intrastate local exchange and exchange access, no certification
                                           required for long distance
      Tennessee     September 18, 1997     local exchange, exchange access and interexchange
  South Carolina     November 10, 1997     resale and facilities-based local exchange, exchange access and
                                           intrastate interexchange
       Florida       December 22, 1997     local exchange and long distance
</TABLE>

     These are all of the states in which the Company operates or currently
intends to begin operations in 1998 or 1999. To the extent that an area within
a state in which the Company operates is served by a small (in line counts) or
rural ILEC not currently subject to competition, the Company may not have
authority to service those areas at this time. Most states regulate entry into
local exchange and other intrastate service markets, and states' regulation of
CLECs vary in their regulatory intensity. The majority of these states mandate
that companies seeking to provide local exchange and other intrastate services
apply for and obtain the requisite authorization from a PUC. This authorization
process generally requires the carrier to demonstrate that it has sufficient
financial, technical, and managerial capabilities and that granting the
authorization will serve the public interest.

     As a CLEC, the Company is subject to the regulatory directives of each
state in which the Company is certified. In addition to tariff filing
requirements (described in greater detail below), most states require that
CLECs charge just and reasonable rates and not discriminate among similarly
situated customers. Some states also require the filing of periodic reports,
the payment of various regulatory fees and surcharges, and compliance with
service standards and consumer protection rules. States also often require
prior approvals or notifications for certain transfers of assets, customers, or
ownership of a CLEC. States generally retain the right to sanction a carrier or
to revoke certifications if a carrier violates relevant laws and/or
regulations.

     In all of the states where US LEC is certified, the Company is required to
file tariffs or price lists setting forth the terms, conditions and/or prices
for services which are classified as intrastate. In some states, the Company's
tariff may list a range of prices or a ceiling price for particular services,
and in others, such prices can be set on an individual customer basis, although
the Company may be required to file tariff addenda of the contract terms. The
Company is not subject to price cap or to rate of return regulation in any
state in which it currently provides services.

     As noted above, the states have the primary regulatory role over
intrastate services under the Telecom Act. The Telecom Act allows state
regulatory authorities to continue to impose competitively neutral and
nondiscriminitory requirements designed to promote universal service, protect
the public safety and welfare, maintain the quality of service and safeguard
the rights of consumers. State PUCs will implement and enforce most of the
Telecom Act's local competition provisions, including those governing the
specific charges for local network interconnection. In some states, those
charges are being determined by generic cost proceedings and in other states
they are being established through arbitration proceedings.

     BellSouth North Carolina PUC Proceeding. The Company has petitioned the
North Carolina Utilities Commission ("NC PUC") to resolve a dispute between the
Company and BellSouth related to their interconnection agreement, dated
November 29, 1996 and approved in North Carolina by the NC PUC by an order
dated January 29, 1997 (effective November 20, 1996). In August 1997, BellSouth
issued a memorandum to the Company in which BellSouth announced its unilateral
decision to neither bill nor pay reciprocal charges for traffic terminated by a
CLEC or BellSouth to ESPs including ISPs. The Company believes this memorandum
was sent to all CLECs who have an interconnection agreement with BellSouth.
BellSouth based its announcement on the theory that such traffic is not
"local," and therefore not subject to reciprocal compensation. On October 24,
1997, the Company filed a petition with the NC PUC seeking an order which,
among other things, would direct BellSouth to pay reciprocal compensation for
all local traffic terminated on the Company's network, including traffic
terminated by US LEC to its customers which are ESPs or ISPs. The petition,
among other things, also


                                       31
<PAGE>

noted that similar positions recently had been taken by other RBOCs in other
states; that disputes between those RBOCs and the CLECs regarding ESP and ISP
traffic had been the subject of arbitration and/or complaint proceedings in at
least eight states; and that, as of the date of the petition, the respective
PUCs in all eight states had ordered the payment of reciprocal compensation for
traffic terminated by the CLEC to ESPs and ISPs. As of February 13, 1998,
twelve states (including Virginia) have ordered the payment by an RBOC of
reciprocal compensation for traffic terminated by a CLEC to an ESP or ISP. The
FCC is also generally considering the issue of reciprocal compensation to
ISPs/ESPs, and the Eighth Circuit is considering an appeal of the FCC's
decision not to impose access charges on ISPs. There can be no assurance that
the payment of reciprocal compensation for ISP traffic will be maintained. A
determination that such traffic is not subject to reciprocal compensation would
have a material adverse effect on the Company.

   
     On February 26, 1998, the North Carolina PUC ruled that the reciprocal
compensation provision contained in the interconnection agreement between
BellSouth and the Company is fully applicable to traffic terminated to ESP and
ISP customers when the originating caller and the called number are associated
with the same calling area, and directed BellSouth to bill and pay reciprocal
compensation for all such calls. On March 27, 1998, BellSouth filed a motion
requesting (i) a stay of the order issued by the NC PUC, (ii) an extension of
the period during which BellSouth must file an appeal of the NC PUC order with
an intermediate state appeallate court and (iii) permission to deposit the
disputed amounts into an interest bearing escrow account under the control of
an agent acceptable to both parties. In an order dated March 31, 1998, the NC
PUC granted BellSouth's motion, thereby extending the appeal period to April
27, 1998. In addition, under the Telecom Act, BellSouth may be entitled to seek
review of the decision of the North Carolina PUC by the United States District
Court for the Eastern District of North Carolina.
    

     While the Company believes that it will ultimately be successful on any
appeal or review of this proceeding, there can be no assurances in this regard,
and it is possible that an adverse result could occur if an appeal or other
review is sought. A final determination that such traffic is not eligible for
reciprocal compensation would have a material adverse effect on the Company. In
addition to this proceeding, PUCs in Tennessee, Georgia and Florida are
currently reviewing this issue. See "Risk Factors -- Uncertainties Related to
Reciprocal Compensation."


Competition

     As noted above, the regulatory environment in which the Company operates
is changing rapidly. The passage of the Telecom Act combined with other actions
by the FCC and state regulatory authorities continues to promote competition in
the provision of telecommunications services.

     ILECs. In each market served by its networks, the Company faces, and
expects to continue to face, significant competition from the ILECs, which
currently dominate their local telecommunications markets.

     The Company competes with the ILECs in its markets for local exchange
services on the basis of product offerings, reliability, state-of-the-art
technology, price, route diversity, ease of ordering and customer service.
However, the ILECs have long-standing relationships with their customers and
provide those customers with various transmission and switching services that
the Company, in a few cases, does not currently offer. In addition, ILECs enjoy
a competitive advantage due to their vast financial resources. The Company has
sought, and will continue to seek, to achieve parity with the ILECs in order to
become able to provide a full range of local telecommunications services. See
"Business -- Regulation" for additional information concerning the regulatory
environment in which the Company operates. Because US LEC leases fiber optic
transmission capacity to link its customers with its networks, and uses
state-of-the-art technology in its switch platforms, the Company may have cost
and service quality advantages over some currently available ILEC networks.

     Other Competitors. The Company also faces, and expects to continue to
face, competition from other potential competitors in certain of the markets in
which the Company offers its services. In addition to the ILECs and CAPs,
potential competitors capable of offering switched local and long distance
services include long distance carriers, cable television companies, electric
utilities, microwave carriers, wireless telephone system operators and private
networks built by large end-users. Many of these potential competitors enjoy
competitive advantages based upon existing relationships with subscribers and
vast financial resources.

     The Company believes that the Telecom Act as well as a recent series of
completed and proposed transactions between ILECs and long distance companies
and cable companies increase the likelihood that barriers to


                                       32
<PAGE>

local exchange competition will be removed. The Telecom Act, as passed,
conditioned the provision of in-region, inter-LATA services by RBOCs upon a
demonstration that the market in which an RBOC seeks to provide such services
has been opened to competition. When ILECs that are RBOC subsidiaries are
permitted to provide such services, they will be in a position to offer single
source service. ILECs that are not RBOC subsidiaries may offer single source
service presently. As a result of a U.S. District Court's invalidation of
Sections 271-275 of the Telcom Act, RBOCs that were parties to that proceeding
also may have this ability presently. In addition, BellSouth has appealed the
FCC's prior decision denying BellSouth's application to provide in-region long
distance service in South Carolina. BellSouth challenged the decision on the
same basis used by SBC to invalidate Sections 271-275 of the Telecom Act. See
"Business -- Regulation -- U.S. District Court Decision."

     A continuing trend toward business combinations and alliances in the
telecommunications industry may create significant new competitors to the
Company. In addition, many of the Company's existing and potential competitors
have financial, personnel and other resources, including brand name
recognition, significantly greater than those of the Company.

     The Company also competes with long distance carriers in the provision of
long distance services. Although the long distance market is dominated by four
major competitors, hundreds of other companies also compete in the long
distance marketplace.


Properties

     The Company leases all of its administrative and sales offices and its
switch sites. The various leases expire in years ranging from 2000 to 2003. All
have renewal options. Additional office space and switch sites will be leased
or otherwise acquired as the Company's operations and networks are expanded and
as new networks are constructed.


Employees

     As of December 31, 1997, the Company employed 78 people. The Company
expects to employ approximately 270 people by the end of 1998. The Company
considers its employee relations to be good. None of the employees of the
Company is covered by a collective bargaining agreement.


Servicemarks, Trademarks and Trade Names

     The Company uses "US LEC" as its primary servicemark and has developed a
proprietary logo. In October 1996, the Company filed for federal servicemark
and trademark protection of US LEC and its logo. The application for the
servicemark "US LEC" has matured to federal registration on the supplemental
register. The servicemark application for the logo has matured to registration
on the principal register.


Legal Proceedings

     The Company is not currently a party to any legal proceedings, other than
the NC PUC proceeding relating to reciprocal compensation from BellSouth for
ISP and ESP traffic. See "Business -- Regulation -- BellSouth North Carolina
PUC Proceeding."


                                       33
<PAGE>

                                  MANAGEMENT

Directors and Executive Officers

     The following table sets forth certain information regarding the executive
officers and directors of US LEC. Directors of the Company are elected annually
at the annual meeting of stockholders. The backgrounds and business experience
of the Company's executive officers and directors are described following the
table.



<TABLE>
<CAPTION>
            Name                Age                             Position
- ----------------------------   -----   ---------------------------------------------------------
<S>                            <C>     <C>
    Richard T. Aab             48      Chairman, Chief Executive Officer and Director (Class B
                                       Director)
    Tansukh V. Ganatra         54      President, Chief Operating Officer and Director (Class B
                                       Director)
    David N. Vail              41      Executive Vice President -- Finance and Chief Financial
                                       Officer
    David C. Conner            40      Executive Vice President -- Engineering and Operations
    Gary D. Grefrath           56      Executive Vice President -- Administration
    Michael K. Simmons         39      Executive Vice President -- Sales
    Craig K. Simpson           34      Senior Vice President -- Corporate Development
    David M. Flaum *           45      Director (Class A Director)
    Steven L. Schoonover *     52      Director (Class A Director)
</TABLE>

- ----------
* Indicates a member of the Audit Committee.

     Richard T. Aab co-founded US LEC in June 1996 and has served as its
Chairman and Chief Executive Officer and as a Director since that time. In
1982, he co-founded ACC Corp., which is a publicly-traded international
telecommunications company currently under agreement to be acquired by Teleport
Communications Group, Inc. for approximately $1.1 billion. Between 1982 and
1997, Mr. Aab held various positions with ACC Corp. including Chairman, Chief
Executive Officer and Director. Under Mr. Aab's leadership, ACC Corp.
participated in the introduction of competition into local and long distance
telecommunications markets in the United States, Canada and the United Kingdom.
 

     Tansukh V. Ganatra co-founded US LEC in June 1996 and has served as its
President and Chief Operating Officer and as a Director since that time. Mr.
Ganatra is a specialist in the field of intelligent switching technology and
transport network systems. From 1987 to 1997, Mr. Ganatra held various
positions with ACC Corp., including serving as its President and Chief
Operating Officer. Prior to joining ACC Corp., Mr. Ganatra held various
positions during a 19-year career with Rochester Telephone Corp. (now Frontier
Corp.), culminating with the position of Director of Network Engineering.

     David N. Vail has been US LEC's Executive Vice President -- Finance and
Chief Financial Officer since August 1997. Prior to joining US LEC, Mr. Vail
served as the controller for Harris Beach & Wilcox LLP, a multi-state law firm
based in Rochester, New York, from 1986 to May 1997. From 1984 to 1986, Mr.
Vail served as Controller for Voit Corporation, a publicly-traded sporting
goods manufacturer. Prior to his tenure with Voit Corporation, Mr. Vail spent
six years in public accounting with Naramore, Niles and Company, CPAs and
Deloitte & Touche LLP. Mr. Vail is a Certified Public Accountant.

     David C. Conner has been US LEC's Executive Vice President -- Engineering
and Operations since November 1996. From 1990 until he joined US LEC, Mr.
Conner served in various positions with ACC Corp. including Vice President of
Engineering and Operations for one of its cellular operations and Operations
Director for its long distance operations in the United Kingdom. From May 1985
until October 1990, Mr. Conner served in various positions with Rochester
Telephone Corp. (now Frontier Corp.), including several positions in operations
and management information systems. At Rochester Telephone Corp., Mr. Conner
had significant responsibility in the development of operational support
systems, the development and operation of its network control center and the
coordination of installation and repair of facilities.

     Gary D. Grefrath has been US LEC's Executive Vice President --
Administration since August 1996. Prior to joining US LEC, Mr. Grefrath was
employed by Rochester Telephone Corp. (now Frontier Corp.) since 1969,


                                       34
<PAGE>

where he held various positions and most recently was responsible for
management of major areas of administration for that company. He was also
responsible for the preparation of tariff filings with the State of New York
and the FCC and for all service and contractual relations with interexchange
carriers.

     Michael K. Simmons has been US LEC's Executive Vice President -- Sales
since October 1996. Prior to joining US LEC, Mr. Simmons was employed by Time
Warner Communications from December 1993 to October 1996 as its Vice President
and General Manager of western North Carolina operations. From August 1983 to
December 1993, Mr. Simmons was branch manager for MCI Communications Corp's.
("MCI") western North Carolina region and also held various sales, marketing
and management positions in four states.

     Craig K. Simpson joined US LEC in February 1997 as its Vice President --
Marketing, was promoted to Senior Vice President -- Corporate Development in
August 1997 and has since served in this capacity. Prior to joining US LEC, Mr.
Simpson was employed by MCI from 1989 to February 1997, where he most recently
served as carrier manager for its North Carolina operations. In that capacity,
Mr. Simpson was responsible for sales to interexchange carriers, CLECs and
independent telephone companies. From 1985 to 1988, Mr. Simpson was employed by
Unisys Corporation in its computer mainframe sales and marketing division.

     Steven L. Schoonover was elected to US LEC's Board of Directors in January
1998. Mr. Schoonover is President and Chief Executive Officer of CellXion,
Inc., which specializes in construction, installation and management of
cellular telephone and personal communications systems. From 1990 until its
sale in November 1997 to Telephone Data Systems, Inc., Mr. Schoonover served as
President of Blue Ridge Cellular, Inc., a full-service cellular telephone
company. From 1983 to 1996, he served in various positions, including President
and Chief Executive Officer, with Fibrebond Corporation, a firm involved in
site development, shelter and tower construction for the cellular
telecommunications industry.

     David M. Flaum was elected to US LEC's Board of Directors in January 1998.
Mr. Flaum has served as President of Flaum Management Company, Inc. ("Flaum
Management"), a real estate development firm based in Rochester, New York,
since 1985, and President of The Hague Corporation, a commercial real estate
management firm, since 1993. Flaum Management is active in the development of
retail centers, office buildings and high technology facilities in the eastern
United States.


Election of Directors

     The Company's Bylaws provide that the Board of Directors shall consist of
at least three members and no more than eleven members. Pursuant to the
Company's Certificate of Incorporation, so long as there are any shares of
Class B Common Stock outstanding, holders of Class B Common Stock will have the
right to elect two members to the Company's Board of Directors. In addition,
the holders of Class A Common Stock and Class B Common Stock vote together as
one class for the election of the other members of the Company's Board of
Directors.


                                       35
<PAGE>

Executive Compensation

     The following table sets forth, for the year ended December 31, 1997,
individual compensation information for the Chairman and Chief Executive
Officer, the President and Chief Operating Officer and each of the other
executive officers of US LEC who received compensation in excess of $100,000
during the year (the "Named Executive Officers").


                          SUMMARY COMPENSATION TABLE



<TABLE>
<CAPTION>
                                                                Annual Compensation
                                                  -----------------------------------------------
                                                                                  Other Annual            All Other
Name and Principal Position               Year     Salary ($)     Bonus ($)     Compensation ($)     Compensation ($) (1)
- --------------------------------------   ------   ------------   -----------   ------------------   ---------------------
<S>                                      <C>      <C>            <C>           <C>                  <C>
 Richard T. Aab
  Chairman and Chief
  Executive Officer ..................   1997             --            --     --                             --
 Tansukh V. Ganatra
  President and Chief
  Operating Officer ..................   1997          6,750            --          7,968 (2)                423
 Michael K. Simmons
  Executive Vice President --
  Sales ..............................   1997        129,459        37,500     --                            423
 Gary D. Grefrath
  Executive Vice President --
  Administration .....................   1997         81,012        25,000     --                            264
 David C. Conner
  Executive Vice President --
  Engineering and Operations .........   1997         79,785        25,000     --                            260
</TABLE>

- ----------
(1) Consists of premiums paid by the Company for term life insurance for the
Named Executive Officer.

(2) Consists of automobile lease payments.

     The Board of Directors has determined that base salaries for the Company's
executive officers for 1998 will be as follows: Mr. Aab -- $160,000; Mr.
Ganatra -- $150,000; Mr. Simmons -- $125,000; Mr. Grefrath -- $95,000; Mr.
Conner -- $95,000; Mr. Vail -- $95,000; and Mr. Simpson -- $90,000. See
"Certain Relationships and Related Transactions."


Compensation of Directors

     Following completion of the Offering, US LEC intends to pay its directors
who are not officers or employees ("Outside Directors") an annual retainer of
$5,000 and a fee of $1,000 for each meeting of the Board of Directors and $500
for each meeting of any committee thereof attended. The Company also will
reimburse each director for reasonable out-of-pocket expenses incurred in
attending meetings of the Board of Directors and any of its committees.
Immediately upon completion of the Offering, each of the Company's two Outside
Directors will be granted nonqualified stock options under the Stock Plan
covering 5,000 shares of Class A Common Stock with an exercise price equal to
the initial public offering price of the Class A Common Stock.


Omnibus Stock Plan

     The Company adopted the US LEC Corp. 1998 Omnibus Stock Plan in January
1998 (the "Stock Plan"). The Stock Plan is intended to enable the Company to
recruit, reward, retain and motivate employees and to attract and retain
outside directors, agents and consultants on a basis competitive with industry
practices. The Company has reserved 650,000 shares of Class A Common Stock for
issuance under the Stock Plan.

     The Stock Plan will be administered by the Board of Directors or the
Compensation Committee of the Board of Directors (such committee or the Board
of Directors itself, as applicable, is hereinafter referred to as the
"Committee"). Awards under the Stock Plan may include, but are not limited to,
stock options, stock appreciation rights, restricted stock, performance awards,
or other stock-based awards, such as stock units, securities convertible into
stock, phantom securities and dividend equivalents. The Committee has sole
authority and discretion under the Stock Plan to (i) designate eligible
participants and (ii) determine the types of awards to be


                                       36
<PAGE>

granted and the conditions and limitations applicable to such awards, if any,
including the acceleration of vesting or exercise rights upon a Change in
Control of the Company (as defined in the Stock Plan). The awards may be
granted singly or together with other awards, or as replacement of, in
combination with, or as alternatives to, grants or rights under the Stock Plan
or other employee benefit plans of US LEC. Awards under the Stock Plan may be
issued based on past performance, as an incentive for future efforts or
contingent upon the future performance of the Company.

     Options granted under the Stock Plan must be exercised within the period
fixed by the Committee, which may not exceed 10 years from the date of the
option grant, or in the case of incentive stock options granted to any 10%
stockholder, five years from the date of the option grant. Options may be made
exercisable in whole or in installments, as determined by the Committee. Except
as authorized by the Committee, options will not be transferable other than by
will or the laws of descent and distribution and, during the lifetime of an
optionee, may be exercised only by the optionee. The option price will be
determined by the Committee. However, the option price for incentive stock
options may not be less than the market value of the Class A Common Stock on
the date of grant of the option and the option price for incentive stock
options granted to any 10% stockholder may not be less than 110% of the market
value of the Class A Common Stock on the date of grant. Unless otherwise
designated by the Committee as "incentive stock options" intended to qualify
under Section 422 of the Internal Revenue Code of 1986, as amended, options
granted under the Stock Plan are intended to be "nonqualified stock options."

     The Committee has granted incentive stock options covering 182,800 shares
of Class A Common Stock to substantially all employees of the Company who are
not executive officers. These options vest annually in four equal installments
beginning in the first quarter of 1999 and the exercise price is $10.00 per
share. Immediately upon completion of the Offering, the Committee intends to
grant nonqualified stock options covering 5,000 shares of Class A Common Stock
to each of the Company's two Outside Directors at an exercise price equal to
the initial public offering price of the Class A Common Stock.

     Promptly after completion of the Offering, the Company intends to register
the shares of Class A Common Stock reserved for issuance under the Stock Plan
under the Securities Act. See "Shares Eligible for Future Sale."


                CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     At January 31, 1998, the Company's indebtedness to Messrs. Aab and
Ganatra, and Melrich Associates, L.P. ("Melrich"), an entity of which Mr. Aab
is a general partner, was $8,289,150. The borrowings were allocated as follows:
Mr. Aab ($5,000,000), Mr. Ganatra ($1,000,000) and Melrich ($2,289,150). On
February 14, 1998, the entire principal amount of the loan payable to Mr. Aab
was exchanged for 480,770 shares of Class B Common Stock. The terms of the
loans outstanding to Mr. Ganatra and Melrich currently provide for interest at
an annual rate of 12% per annum, payable quarterly and a due date of January
16, 2003. The Company's operating subsidiaries in North Carolina and Georgia
have guaranteed the payment of the loans and granted to Mr. Ganatra and Melrich
a security interest in substantially all of such subsidiaries' assets.
Management believes that the terms of these loan transactions were no less
favorable to the Company than could be arranged with unrelated lenders. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."

     Under a consulting agreement between US LEC and a limited liability
company owned in its entirety by Mr. Aab, the limited liability company
provided strategic, financial planning and other consulting services to US LEC
in 1997 for a fee $125,000. Under a consulting agreement with a limited
partnership controlled by Mr. Ganatra, the limited partnership provided general
business and operations advice to the Company in exchange for a fee of $50,000.
These agreements were terminated on December 31, 1997. Management believes that
the terms of these consulting agreements were no less favorable to the Company
than could have been arranged with unrelated third parties.

     In January 1998, the Company agreed to purchase a Carrier Access Billing
System and related software and support systems from Global Vista
Communications, LLC ("Global") for $397,500. Mr. Aab owns a 44% equity interest
in Global, but does not control the company and is not active in its
management. Management believes that the quality and pricing of these systems
were comparable to systems available from unrelated vendors.


                                       37
<PAGE>

                       SECURITY OWNERSHIP OF MANAGEMENT

   
     As of March 31, 1998, there were 53 holders of record of the Common Stock.
The following table sets forth certain information with respect to the
beneficial ownership of shares of Common Stock as of March 31, 1998 and as
adjusted to reflect the sale of shares of Class A Common Stock in the Offering,
by (i) each director of the Company, (ii) each of the Named Executive Officers,
(iii) each person known by the Company to beneficially own 5% or more of the
outstanding shares of any class of Common Stock and (iv) all directors and
executive officers of US LEC as a group.
    



<TABLE>
<CAPTION>
                                                                                Prior to the Offering (1)
                                                                         ----------------------------------------
                                                          Amount and                  Percent of     Percent of
             Name and Address              Title of       Nature of        Percent   Total Shares   Total Voting
           of Beneficial Owner               Class      Ownership (2)     of Class    Outstanding       Power
- ----------------------------------------- ---------- ------------------- ---------- -------------- --------------
<S>                                       <C>        <C>                 <C>        <C>            <C>
Richard T. Aab ..........................   Class B       17,075,270(3)     100.0%        81.6%          97.8%
Joyce M. Aab ............................   Class B        4,309,500(3)      25.2%        20.6%          24.7%
Tansukh V. Ganatra ......................   Class B        4,044,000(4)      23.7%        19.3%          23.2%
David C. Conner .........................   Class A          660,000(5)      17.1%         3.2%             *
Gary D. Grefrath ........................   Class A          504,000         13.1%         2.4%             *
Michael K. Simmons ......................   Class A          567,000(6)      14.7%         2.7%             *
David N. Vail ...........................   Class A          183,000(7)       4.6%           *              *
David M. Flaum ..........................   Class A          180,000          4.7%           *              *
Steven L. Schoonover ....................   Class A               --           --           --             --
Craig K. Simpson ........................   Class A          174,000(8)       4.3%           *              *
All directors and executive officers as a
 group (9 persons) ......................   Class A        2,268,000         54.2%        10.7%           1.3%
                                            Class B       17,075,270        100.0%        81.6%          97.8%



<CAPTION>
                                                  After the Offering (1)
                                          ---------------------------------------
                                                       Percent of     Percent of
             Name and Address               Percent   Total Shares   Total Voting
           of Beneficial Owner             of Class    Outstanding      Power
- ----------------------------------------- ---------- -------------- -------------
<S>                                       <C>        <C>            <C>
Richard T. Aab ..........................    100.0%        64.6%         94.8%
Joyce M. Aab ............................     25.2%        16.3%         23.9%
Tansukh V. Ganatra ......................     23.7%        15.3%         22.5%
David C. Conner .........................      7.1%         2.5%            *
Gary D. Grefrath ........................      5.4%         1.9%            *
Michael K. Simmons ......................      6.1%         2.1%            *
David N. Vail ...........................      1.9%           *             *
David M. Flaum ..........................      1.9%           *             *
Steven L. Schoonover ....................       --           --            --
Craig K. Simpson ........................      1.8%           *             *
All directors and executive officers as a
 group (9 persons) ......................     23.4%         8.5%          1.3%
                                             100.0%        64.6%         94.8%
</TABLE>

- ----------
(1) An "*" indicates less than one percent.

   
(2) In accordance with Commission rules, each beneficial owner's holdings have
    been calculated assuming full exercise of outstanding warrants and options
    exercisable by such holder within 60 days after March 31, 1998, but no
    exercise of outstanding warrants and options held by any other person. The
    table set forth above assumes that the over-allotment option is not
    exercised by the Underwriters. Except as otherwise indicated, each person
    named in this table has sole voting and dispositive power with respect to
    the shares of Common Stock beneficially owned by such person.
    

(3) Includes 4,309,500 shares held by Melrich. Mr. Aab and his wife, Joyce M.
    Aab, are the sole general partners of Melrich and share voting and
    dispositive power with respect to these shares. Also includes 4,044,000
    shares held by Mr. Ganatra and Super STAR Limited Partnership as to which
    Mr. Aab holds voting power. Mr. and Mrs. Aab's address is 212 South Tryon
    Street, Suite 1540, Charlotte, NC 28281.

(4) Includes 3,750,000 shares held by Super STAR Associates Limited
    Partnership. Mr. Ganatra, the majority general partner, has dispositive
    power with respect to these shares. Mr. Ganatra's address is 212 South
    Tryon Street, Suite 1540, Charlotte, NC 28281.

(5) Includes 165,000 shares owned by Mr. Conner's wife, as to which he is
    deemed to share voting and dispositive power.

(6) Includes 247,500 shares held by Michael K. Simmons Family Limited
    Partnership as to which Mr. Simmons, the sole general partner, has voting
    and dispositive power.

(7) Includes 165,000 shares subject to a presently exercisable warrant held by
    Mr. Vail.

(8) Includes 165,000 shares subject to a presently exercisable warrant held by
    Mr. Simpson.

                                       38
<PAGE>

                         DESCRIPTION OF CAPITAL STOCK

General

     The authorized capital stock of the Company consists of: (i) 90,000,000
shares of common stock, $.01 par value per share (the "Common Stock"), which is
divided into two classes consisting of 72,924,728 shares of Class A Common
Stock (3,855,000 shares of which were outstanding as of the date of this
Prospectus) and 17,075,272 shares of Class B Common Stock (17,075,270 shares of
which were outstanding as of the date of this Prospectus); and (ii) 10,000,000
shares of preferred stock, $.01 par value per share (the "Preferred Stock"),
none of which are issued and outstanding. Effective upon completion of the
Offering, 9,355,000 shares of Class A Common Stock will be issued and
outstanding, 17,075,270 shares of Class B Common Stock will be issued and
outstanding and no shares of Preferred Stock will be issued and outstanding. In
addition, 650,000 shares of Class A Common Stock are reserved for issuance
under the Stock Plan, 469,000 shares of Class A Common Stock are reserved for
issuance under presently exercisable warrants and 17,075,270 shares of Class A
Common Stock are reserved for issuance upon conversion of the Class B Common
Stock.

     The following summary of certain provisions of the Company's Certificate
of Incorporation ("Certificate") and Bylaws does not purport to be complete and
is subject to, and qualified in its entirety by, reference to the Certificate
and Bylaws of the Company, copies of which have been filed as exhibits to the
registration statement of which this Prospectus is a part.


Common Stock

     The shares of Class A Common Stock and Class B Common Stock are identical
in all respects, except for voting rights and certain conversion rights with
respect to the shares of Class B Common Stock which are described herein.
Shares of Class B Common Stock may be owned only by the holders of Class B
Common Stock as of the date of this Prospectus and their Permitted Transferees
(as defined in the Certificate). Any shares of Class B Common Stock transferred
to any other person automatically convert into shares of Class A Common Stock
on a one-for-one basis. Each share of Class B Common Stock may be converted, at
any time at the option of the holder thereof, into one share of Class A Common
Stock, subject to the rights of other holders of Class B Common Stock under the
Class B Stockholders Agreement. The Class A Common Stock and the Class B Common
Stock are entitled to vote on all matters which come before the stockholders,
voting together as a single class on all matters, except as described below and
as otherwise required by law. Each share of Class A Common Stock has one vote
and each share of Class B Common Stock has 10 votes on all matters on which
holders of Common Stock are entitled to vote. Holders of the Class B Common
Stock are also entitled by the Certificate and Bylaws to approve certain
amendments to the Certificate or the Bylaws.

     The Certificate provides that the Board of Directors shall have two
classes of directors: (i) "Class B Directors," of which there shall be two at
all times during which shares of Class B Common Stock are issued and
outstanding, and (ii) "Class A Directors," who are all directors other than the
Class B Directors. The Class B Directors are elected solely by majority vote of
the holders of Class B Common Stock voting as a separate class. The Class A
Directors are elected by holders of all shares of the Company's capital stock
entitled to vote thereon, voting as a single class, including both shares of
Class A Common Stock and shares of Class B Common Stock. Any Class A Director
may be removed, with or without cause (except as otherwise provided by law), by
the vote of a majority of all votes entitled to be cast in the election of
Class A Directors. However, Class B Directors may be removed only by the
holders of a majority of the shares of Class B Common Stock, and may be removed
with or without cause.

     Holders of Common Stock are entitled to receive ratably such dividends, if
any, as may be declared by the Board of Directors out of funds legally
available therefor, subject to the preferential dividend rights of any
outstanding shares of Preferred Stock. Any dividends declared which are payable
on the Common Stock shall be payable at the same rate on both classes of Common
Stock. Upon the liquidation, dissolution or winding-up of the Company, the
holders of Common Stock are entitled to receive ratably the net assets of the
Company available after the payment of all debts and other liabilities and
subject to the prior rights of any outstanding shares of Preferred Stock.
Holders of Common Stock have no preemptive, subscription or redemption rights.
All the outstanding shares of Common Stock are fully paid and nonassessable.
The rights, preferences and privileges of holders of Common Stock are subject
to, and may be adversely affected by, the rights of the holders of shares of
any series of Preferred Stock that the Company may designate and issue in the
future.


                                       39
<PAGE>

Agreement Among Class B Stockholders

     The holders of the Class B Common Stock entered into an agreement on
January 1, 1998 (the "Class B Stockholders Agreement") pursuant to which, among
other things, they agreed to grant to Mr. Aab an irrevocable proxy to vote all
of their shares of Class B Common Stock, and Mr. Aab has agreed to vote the
shares of Class B Common Stock covered by the proxy to elect Mr. Ganatra as a
director. In addition, the Class B Stockholders Agreement provides that if a
party to the agreement proposes to sell or otherwise transfer shares of Class B
Common Stock to anyone other than a Permitted Transferee (such as lineal
descendants of the Class B Stockholders, trusts for the benefit of such holders
and descendants, and corporations, partnerships and other entities and business
organizations controlled by the Class B Stockholders), the other holders of
Class B Common Stock who are parties to the Class B Stockholders Agreement
would have a right to acquire the shares of Class B Common Stock that are
proposed to be sold or transferred. The Class B Stockholders Agreement also
provides that if a party to the agreement proposes to convert his, her or its
shares of Class B Common Stock into shares of Class A Common Stock, the other
parties to the Class B Stockholders Agreement have the right to purchase the
shares of Class B Common Stock proposed to be converted or to exchange shares
of Class A Common Stock for such shares. The Class B Stockholders Agreement has
an initial term of ten years.


Preferred Stock

     Under the terms of the Certificate, the Board of Directors of the Company
is authorized to issue shares of Preferred Stock in one or more series without
stockholder approval, subject to any limitations prescribed by law. Each series
of Preferred Stock shall have such rights, preferences, privileges and
restrictions, including voting rights, dividend rights, conversion rights,
redemption privileges and liquidation privileges, as shall be determined by the
Board of Directors. The purpose of authorizing the Board of Directors to issue
Preferred Stock and determine its rights and preferences is to eliminate delays
associated with a stockholder vote on specific issuances. The issuance of
Preferred Stock, while providing desirable flexibility in connection with
possible acquisitions and other corporate purposes, could have the effect of
making it more difficult for a third party to acquire, or of discouraging a
third party from acquiring, a majority of the outstanding voting stock of the
Company. No shares of Preferred Stock have been issued or authorized for
issuance, and there are no agreements or undertakings relating to the issuance
of shares of Preferred Stock.


Board of Directors

     Under the terms of the Certificate and the Bylaws, the Board of Directors
consists of at least three directors and no more than eleven directors. As
noted above, at all times when shares of Class B Common Stock are outstanding,
the two directors who are designated as "Class B Directors" are elected by the
holders of a majority of the shares of the Class B Common Stock voting as a
separate class, and Class B Directors may only be removed by the affirmative
vote of a majority of the holders of the Class B Common Stock.

     The Bylaws provide that if at any time the number of directors is seven or
more, the terms of the Class A Directors shall be staggered and the Class A
Directors shall be grouped into three classes of nearly equal size. If the
Class A Directors are staggered, the first staggered class shall be elected for
an initial three year term, the second staggered class shall be elected for an
initial two year term and the third staggered class shall be elected for an
initial one year term. Thereafter, at each annual meeting of stockholders,
directors shall be elected to fill the seats of the staggered class of Class A
Directors whose term then expires shall be elected for three year terms. If the
terms of office of the Class A Directors are staggered, then the Class A
Directors may be removed only for cause during the term for which they have
been elected.


Warrants

     The Company has issued warrants to three of its employees which entitle
them to acquire an aggregate of 345,000 shares of Class A Common Stock at an
exercise price of $2.86 per share. These warrants may be exercised, in whole or
in part, at any time prior to August 4, 2000 (with respect to 330,000 shares)
or prior to November 10, 2000 (with respect to 15,000 shares). The Company has
also issued a warrant to a sales agent which entitles him to acquire 99,000
shares of Class A Common Stock at an exercise price of $2.86 per share with an
expiration date of August 1, 2000 and a warrant to a consultant which entitles
him to acquire 25,000 shares of Class A Common Stock at an exercise price of
$10.00 per share with an expiration date of January 1, 2001. These warrants may
be exercised, in whole or in part, at any time prior to their expiration dates.
 


                                       40
<PAGE>

Certain Charter and Statutory Provisions

     Article VIII of the Certificate provides that the Company shall indemnify
all directors and officers to the full extent permitted by the General
Corporation Law of the State of Delaware (the "Delaware Law"), or any other
applicable laws as now or hereafter in effect. In addition, the Certificate
authorizes the Company to enter into one or more agreements with any person
which provide for indemnification greater or different than that provided in
its Certificate.

     Section 145 of the Delaware Law permits a corporation to indemnify its
directors and officers against expenses (including attorney's fees), judgments,
fines and amounts paid in settlements actually and reasonably incurred by them
in connection with any action, suit or proceeding, whether criminal or civil,
brought by a third party if such directors or officers acted in good faith and
in a manner they reasonably believed to be in or not opposed to the best
interests of the corporation and, with respect to any criminal action or
proceeding, had no reason to believe their conduct was unlawful.

     In addition, Section 102 of the Delaware Law provides that a corporation
may include in its certificate of incorporation a provision eliminating or
limiting the personal liability of directors for monetary damages for breach of
fiduciary duty, provided that such provision shall not eliminate or limit the
liability of a director: (i) for any breach of the director's duty of loyalty
to the corporation or its stockholders; (ii) for acts or omissions not in good
faith that involve intentional misconduct or a knowing violation of the law;
(iii) for conduct leading to unlawful distributions by the corporation; or (iv)
for any transaction from which the director derived an improper personal
benefit. The Certificate includes such a provision. The effect of this
provision is to eliminate the rights of the Company and its stockholders
(through stockholder's derivative suits on behalf of the Company) to recover
monetary damages against a director for breach of fiduciary duty of care as a
directory (including breaches resulting from negligent or grossly negligent
behavior) except in situations described in clauses (i) through (iv) above.
This provision does not limit or eliminate the rights of the Company or any
stockholder to seek nonmonetary relief (such as an injunction or rescission) in
the event of a breach of a director's duty of care.

     Following the Offering, the Company will also be subject to the provisions
of Section 203 of the Delaware Law. In general, the statute prohibits a
publicly-held Delaware corporation from engaging in a "business combination"
with an "interested stockholder" for a period of three years after the date of
the transaction in which the person became an interested stockholder, unless
(i) prior to such date the board of directors of the corporation approved
either the business combination or the transaction that resulted in the
stockholder becoming an interested stockholder, (ii) upon consummation of the
transaction that resulted in such person becoming an interested stockholder,
the interested stockholder owned at least 85% of the voting stock of the
corporation outstanding at the time the transaction commenced (excluding, for
purposes of determining the number of shares outstanding, shares owned by
certain directors or certain employee stock plans), or (iii) on or after the
date the stockholder became an interested stockholder, the business combination
is approved by the board of directors and authorized by the affirmative vote
(and not by written consent) of at least two-thirds of the outstanding voting
stock excluding that stock owned by the interested stockholder. For the
purposes of Section 203, a "business combination" includes a merger, asset sale
or other transaction resulting in a financial benefit to the interested
stockholder, as well as any transaction that has the effect of increasing the
interested stockholder's proportionate share ownership in the corporation. An
"interested stockholder" is a person who (other than the corporation and any
direct or indirect majority-owned subsidiary of the corporation) together with
affiliates and associates owns (or, as an affiliate or associate, within three
years prior, did own) 15% or more of the corporation's outstanding voting
stock.

     Section 203, however, expressly exempts from the requirements described
above any business combination by a corporation with an interested stockholder
who became an interested stockholder at a time when the section did not apply
to the corporation. It further provides that its provisions shall not apply if
the corporation does not have a class of voting stock that (i) is listed on a
national securities exchange, (ii) authorized for quotation on the Nasdaq
National Market or (iii) held of record by more than 2,000 stockholders (unless
any of the foregoing results from a transaction in which a person becomes an
interested stockholder). Mr. Aab, Melrich, Mr. Ganatra and Super STAR
Associates Limited Partnership became interested stockholders prior to the
Offering at a time when such exemption from the provisions of Section 203
applied to the Company. Accordingly, future transactions between the Company
and such persons and entities will not be subject to the requirements of
Section 203.


                                       41
<PAGE>

Listing

   
     The Class A Common Stock has been conditionally approved for listing on
the Nasdaq National Market under the symbol "CLEC."
    


Transfer Agent and Registrar

     First Union National Bank, Charlotte, North Carolina will be the transfer
agent and registrar for the Class A Common Stock (the "Transfer Agent").


                        SHARES ELIGIBLE FOR FUTURE SALE

     Upon completion of the Offering, 9,355,000 shares of Class A Common Stock
will be outstanding, excluding (i) 182,800 shares reserved for issuance upon
exercise of options that have been granted under the Stock Plan, none of which
are currently vested, (ii) 10,000 shares issuable upon exercise of options to
be granted at the completion of the Offering under the Stock Plan, (iii)
469,000 shares reserved for issuance upon exercise of presently exercisable
warrants and (iv) 17,075,270 shares reserved for issuance upon conversion of
Class B Common Stock. Of these shares, the 5,500,000 shares of Class A Common
sold in the Offering will be freely tradable without restriction or further
registration under the Securities Act, except for any shares purchased by an
"affiliate" (as defined in the Securities Act) of the Company, which will be
subject to the resale limitations of Rule 144 ("Rule 144") under the Securities
Act. The remaining shares of Class A Common Stock outstanding and all of the
shares of Class B Common Stock outstanding will be "restricted securities" as
that term is defined in Rule 144, and may in the future be sold without
restriction under the Securities Act to the extent permitted by Rule 144 or any
applicable exemption under the Securities Act.

     In general, under Rule 144 as currently in effect, beginning 90 days after
the date of this Prospectus a person (or persons whose shares are aggregated)
who has beneficially owned its, his or her restricted securities (as that term
is defined in Rule 144) for at least one year from the date such securities
were acquired from the Company or an affiliate of the Company would be entitled
to sell within any three-month period a number of shares that does not exceed
the greater of (i) one percent of the then outstanding shares of the Class A
Common Stock and (ii) the average weekly trading volume of the Class A Common
Stock during the four calendar weeks preceding a sale by such person. Sales
under Rule 144 are also subject to certain manner-of-sale provisions, notice
requirements and the availability of current public information about the
Company. Under Rule 144, however, a person who has held restricted securities
for a minimum of two years from the later of the date such securities were
acquired from the Company or an affiliate of the Company and who is not, and
for the three months prior to the sale of such restricted securities has not
been, an affiliate of the Company, is free to sell such shares of Class A
Common Stock without regard to the volume, manner-of-sale and the other
limitations contained in Rule 144. The foregoing summary of Rule 144 is not
intended to be a complete discussion thereof.

     Of the outstanding shares of Class A Common Stock that will be "restricted
securities," all of such shares will be eligible for sale in the public market
subject to the volume, manner of sale and other limitations of Rule 144
described below after December 31, 1998. The 17,075,270 shares of Class B
Common Stock outstanding upon completion of the Offering will also be
restricted securities. Each share of Class B Common Stock may be converted at
any time by the holder thereof into one share of Class A Common Stock, subject
to the rights of other holders of Class B Common Stock under the Class B
Stockholders Agreement. If any shares of Class B Common Stock are converted by
the current holders into shares of Class A Common Stock, the holding period of
the shares of Class A Common Stock could, under the provisions of Rule 144, be
tacked with the holding period of the Class B Common Stock such that 16,594,500
of such shares will be eligible for sale in the public market after December
31, 1998 and the remainder will be eligible for sale in the public market after
February 14, 1999 subject to the volume, manner of sale and other limitations
of Rule 144.

     The Company, its directors and executive officers, who will beneficially
own, as of the completion of this Offering, an aggregate of 2,268,000 shares of
Class A Common Stock (or presently exercisable warrants to purchase Class A
Common Stock) and 17,075,270 shares of Class B Common Stock (which, subject to
the terms of the Class B Stockholders Agreement, may be converted at any time
into shares of Class A Common Stock and, pursuant to the Certificate,
automatically convert into shares of Class A Common Stock as a result of
certain transfers), have each agreed not to offer, sell or contract to sell, or
otherwise dispose of, directly or indirectly, or announce an offering of, any
shares of Class A Common Stock or any securities convertible into, or


                                       42
<PAGE>

exchangeable for, shares of Class A Common Stock for a period of 180 days from
the date of this Prospectus, without the prior written consent of Smith Barney
Inc. except under limited circumstances.

   
     Promptly upon completion of the Offering, the Company intends to file a
Registration Statement on Form S-8 with the Commission to register 650,000
shares of Class A Common Stock reserved for issuance or sale under the Stock
Plan. As of March 31, 1998, there were outstanding options to purchase a total
of 182,800 shares of Class A Common Stock, none of which were vested, and
outstanding and presently exercisable warrants to purchase a total of 469,000
shares of Class A Common Stock. Following such registration, all shares of
Class A Common Stock issuable upon the exercise of options granted under the
Stock Plan will be freely tradable without restriction under the Securities
Act, unless such shares are held by an affiliate of the Company.
    

     Prior to the Offering, there has been no established market for the Class
A Common Stock, and no predictions can be made about the effect, if any, that
market sales of shares of Class A Common Stock or the availability of such
shares for sale will have on the market price prevailing from time to time.
Nevertheless, the actual sale of, or the perceived potential for the sale of,
Class A Common Stock in the public market may have an adverse effect on the
market price for the Class A Common Stock.


                                 UNDERWRITING

     Subject to the terms and conditions set forth in an underwriting agreement
among the Company and the Underwriters (the "Underwriting Agreement"), the
Company has agreed to sell to each of the Underwriters named below (the
"Underwriters"), for whom Smith Barney Inc., Bear, Stearns & Co. Inc. and Wheat
First Union, a division of Wheat First Securities, Inc., are acting as
representatives (the "Representatives"), and each of the Underwriters has
severally agreed to purchase from the Company the aggregate number of shares of
Class A Common Stock set forth opposite its name below:



<TABLE>
<CAPTION>
                                                  Number of
                 Underwriters                      Shares
- ----------------------------------------------   ----------
<S>                                              <C>
        Smith Barney Inc. ....................
        Bear, Stearns & Co. Inc. .............
        Wheat First Securities, Inc. .........
 
            Total ............................   5,500,000
                                                 =========
</TABLE>

     The Company has been advised by the Representatives that the several
Underwriters propose initially to offer the shares of Class A Common Stock to
the public at the Price to Public set forth on the cover page of this
Prospectus, and to certain dealers at such price less a discount not in excess
of $   per share. The Underwriters may allow, and such dealers may reallow, a
discount not in excess of $     per share on sales to certain other dealers.
After the initial public offering, the public offering price and such
concessions may be changed.

     The Company has granted the Underwriters an option, exercisable within 30
days of the date of this Prospectus, to purchase up to 825,000 additional
shares of Class A Common Stock to cover over-allotments, if any, at the Price
to the Public set forth on the cover page of this Prospectus less the
Underwriting Discount. To the extent that the Underwriters exercise such
option, in whole or in part, each Underwriter will have a firm commitment,
subject to certain conditions, to purchase a number of option shares
proportionate to such Underwriter's initial commitment.

     The Underwriting Agreement provides that the obligations of the
Underwriters to purchase the Class A Common Stock listed above are subject to
certain conditions set forth therein. The Underwriters are committed


                                       43
<PAGE>

to purchase all of the Class A Common Stock offered by this Prospectus (other
than those covered by the Underwriters' overallotment option described in the
immediately preceding paragraph), if any are purchased. In the event of default
by any Underwriter, the Underwriting Agreement provides that, in certain
circumstances, the purchase commitments of the non-defaulting Underwriters may
be increased or the Underwriting Agreement may be terminated. The obligations
of the Underwriters under the Underwriting Agreement are several and may be
terminated in their discretion upon the occurrence of certain stated events
including if certain events have occurred the effect of which on financial
markets is such as to make it, in the judgment of the Underwriters,
impracticable or inadvisable to proceed with the Offering.

     The Underwriting Agreement provides that the Company will indemnify the
several Underwriters against certain liabilities, including liabilities under
the Securities Act, or contribute to payments the Underwriters may be required
to make in respect thereof.

     The Company and its directors and executive officers have each agreed with
the Underwriters that they will not offer, sell or contract to sell, or
otherwise dispose of, directly or indirectly, or announce an offering of, any
shares of Class A Common Stock or any securities convertible into, or
exchangeable for, shares of Class A Common Stock for a period of 180 days from
the date of this Prospectus, without the prior written consent of Smith Barney
Inc., except (a) in the case of the Company, (i) grants of options and
issuances and sales of Class A Common Stock issued pursuant to the Stock Plan,
(ii) issuances of Class A Common Stock upon the conversion of shares of Class B
Common Stock or the exercise of warrants outstanding on the date of the
Underwriting Agreement or (iii) issuance of Common Stock or securities
convertible into Common Stock in connection with acquisitions; provided that
the recipients of such shares of Common Stock agree in writing with Smith
Barney Inc. to be bound by the unexpired term of such agreement not to sell;
and (b) in the case of directors and executive officers, shares of Class A
Common Stock disposed of as bona fide gifts or pledges where the recipients of
such gifts or the pledgees, as the case may be, agree in writing with Smith
Barney Inc. to be bound by the terms of such agreement.

   
     At the request of the Company, the Underwriters have reserved up to
385,000 shares of Class A Common Stock for sale at the Price to Public set
forth on the cover page of this Prospectus to certain officers, directors,
employees and other persons designated by the Company. The number of shares of
Class A Common Stock available for sale to the general public will be reduced
to the extent such persons purchase such reserved shares. Any reserved shares
not so purchased will be offered by the Underwriters to the general public on
the same basis as the other shares offered hereby.
    

     The Representatives have informed the Company that they do not expect
sales to accounts over which they exercise discretionary authority to exceed
five percent of the total number of shares of Class A Common Stock sold in the
Offering.

     Prior to the Offering, there has been no public market for the Class A
Common Stock. Accordingly, the initial public offering price for the Class A
Common Stock will be determined by negotiation among the Company and the
Representatives. Among the factors considered in determining the initial public
offering price of the Class A Common Stock, in addition to prevailing market
conditions, will be the Company's historical performance, estimates of the
business potential and earnings prospects of the Company, an assessment of the
Company's management and the consideration of the above factors in relation to
market valuation of companies in related businesses. There can be no assurance
that the price at which shares of Class A Common Stock will sell in the public
market after the Offering will not be lower than the price at which they are
sold in the Offering by the Underwriters.

   
     The Class A Common Stock has been conditionally approved for listing on
the Nasdaq National Market under the symbol "CLEC."
    

     In connection with the Offering, the Underwriters may purchase and sell
the Class A Common Stock in the open market in accordance with Regulation M
under the Securities Exchange Act of 1934, as amended (the "Exchange Act").
These transactions may include over-allotment and stabilizing transactions and
purchases to cover syndicate short positions created in connection with the
Offering. Stabilizing transactions consist of certain bids or purchases for the
purpose of preventing or retarding a decline in the market price of the Class A
Common Stock; and syndicate short positions involve the sale by the
Underwriters of a greater number of shares


                                       44
<PAGE>

of Class A Common Stock than they are required to purchase from the Company in
the Offering. The Underwriters also may impose a penalty bid, whereby selling
discounts allowed to syndicate members or other broker-dealers in respect of
the securities sold in the Offering for their account may be reclaimed by the
syndicate if such securities are repurchased by the syndicate in stabilizing or
covering transactions. These activities may stabilize, maintain or otherwise
affect the market price of the Class A Common Stock, which may be higher than
the price that might otherwise prevail in the open market; and these
activities, if commenced, may be discontinued at any time. These transactions
may be effected on the Nasdaq National Market in the over-the-counter market or
otherwise.


                                 LEGAL MATTERS

     The validity of the Class A Common Stock will be passed upon for the
Company by Moore & Van Allen, PLLC, Charlotte, North Carolina and for the
Underwriters by Paul, Hastings, Janofsky & Walker LLP, New York, New York.


                                    EXPERTS

     The financial statements included in this Prospectus have been audited by
Deloitte & Touche LLP, independent public accountants, as stated in their
report appearing herein; and are included in reliance upon the report of said
firm given upon their authority as experts in accounting and auditing.


                             AVAILABLE INFORMATION

     The Company has filed a Registration Statement on Form S-1, Commission
File No. 333-46341, under the Securities Act with the Commission with respect
to the shares of Class A Common Stock offered by the Offering. This Prospectus,
which is part of the Registration Statement, does not contain all of the
information set forth in the Registration Statement and the exhibits and
schedules thereto. For further information with respect to the Company and the
Class A Common Stock, reference is made to the Registration Statement and the
exhibits and schedules filed therewith. Statements contained in this Prospectus
as to the contents of any contract or any other document to which reference is
made are necessarily summaries thereof, and in each instance reference is made
to the copy of such contract or other document filed as an exhibit to the
Registration Statement, each such statement being qualified in all respects by
such reference.

     The Company has not previously been subject to the reporting requirements
of the Exchange Act. Upon completion of the Offering, the Company will be
subject to the informational requirements of the Exchange Act and in accordance
therewith will be required to file periodic reports and other information with
the Commission. Copies of the Registration Statement, periodic reports and
other information filed by the Company with the Commission may be inspected
without charge. Copies of such material may also be obtained at prescribed
rates at the Public Reference Section of the Commission at 450 Fifth Street,
N.W., Washington, DC 20549, or at its regional offices located at Northwestern
Atrium Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661 and
Seven World Trade Center, Suite 1300, New York, New York 10048. In addition,
the Commission maintains a website that contains periodic reports and other
information filed by the Company via the Commission's Electronic Data Gathering
and Retrieval System. This website can be accessed at www.sec.gov. Copies of
such material can be also be obtained from the Company upon request by
contacting the Company at its principal executive office.

     The Company intends to furnish its stockholders with annual reports
containing financial statements audited by an independent public accounting
firm and quarterly reports for the first three quarters of each fiscal year
containing unaudited interim financial information.


                                       45
<PAGE>


                                   GLOSSARY

     CAP -- Competitive access provider.

     CLEC -- Competitive local exchange carrier.

     Communications Act -- Communications Act of 1934, as amended.

     DS-0, DS-1, DS-3, T-1, T-3 -- These are the standard circuit capacity
classifications which are distinguishable by bit rate. Each of these
transmission services can be provided using the same type of fiber optic cable
or other transmission medium, but offer different bandwidth (that is,
capacity), depending upon the individual needs of the end-user. A DS-0 is a
dedicated circuit that is considered to meet the requirements of usual business
communications, with transmission capacity of up to 64 kilobits of bandwidth
per second (that is, a voice grade equivalent circuit). This service offers a
basic low capacity dedicated digital line for connecting telephones, fax
machines, personal computers and other telecommunications equipment. A DS-1 is
a high speed digital circuit typically linking high volume customer locations
to long distance carriers or other customer locations. Typically utilized for
voice transmissions as well as the interconnection of local area networks, DS-1
service accommodates transmission speeds of up to 1.544 megabits per second,
which is equivalent to 24 DS-0 circuits or 24 voice grade equivalent circuits.
DS-3 service provides a very high capacity digital circuit with transmission
capacity of 45 megabits per second, which is equivalent to 28 DS-1 circuits or
672 voice grade equivalent circuits. This is a digital service used by long
distance carriers for central office connections and by some large commercial
users to link multiple sites. T-1 is synonymous with DS-1 and T-3 is synonymous
with DS-3.

     EBITDA -- Net earnings (loss) before interest expense, income taxes,
depreciation and amortization.

     ESP -- Enhanced service provider.

     Equivalent Access Lines -- This term is used by management to quantify the
size of the Company's network. It is based on the number of customer lines and
Trunks and the utilization of those lines and Trunks during the "busy hour."
The "busy hour" refers to the hour of the day when line usage is at its highest
level. The Company calculates its Equivalent Access Lines by multiplying the
number of its Trunks in service by six and adding to the result to the number
of its separate access lines in service. The decision to use six as the
multiplier is based on management's experience, which indicates that the
typical business access line is in use for approximately 400 seconds during the
busy hour (or approximately 11.1% of capacity during the busy hour) and a
typical business Trunk is in use for approximately 2,400 seconds during the
busy hour (or approximately 66.7% of capacity during the busy hour), or
approximately six times use during the busy hour of a typical business line.

     FCC -- The United States Federal Communications Commission.

     ILEC -- Incumbent local exchange carrier.

     ISP -- Internet service provider.

     Interconnect -- Connection of a telecommunications device or service to
the public switched telephone network.

     Inter-LATA -- Telecommunications services originating in a LATA and
terminating outside of that LATA.

     LATA (Local Access and Transport Area) -- one of approximately 200 local
geographic areas in the United States within which a local telephone company
may offer telecommunications services.

     Local Exchange -- A geographic area determined by the appropriate state
regulatory authority in which calls generally are transmitted without toll
charges to the calling or called party.

     Long Distance Carriers (Interexchange Carriers) -- Long distance carriers
provide services between local exchanges on an interstate or intrastate basis.
A long distance carrier may offer services over its own or another carrier's
facilities.

     MOU -- Minutes of use.

     NC PUC -- North Carolina Public Utilities Commission.

     PUC -- Public Utilities Commission.

                                       46
<PAGE>

     RBOC -- Regional bell operating company.

     Reciprocal Compensation -- The compensation paid to and from a CLEC and
the ILEC for termination of a local call on each other's networks.

     Switch -- A device that opens or closes circuits or selects the paths or
circuits to be used for transmission of information. Switching is the process
of interconnecting circuits to form a transmission path between users. It also
captures information for billing purposes.

     Switched Services -- Transmission of switched calls through the local
switched network.

     Telecom Act -- Telecommunications Act of 1996.

     Trunk -- A DS-0 which concentrates subscriber lines. A trunked system
combines multiple channels with unrestricted access in such a manner that user
demands for channels are automatically "queued" and then allocated to the first
available channel.

   
     VAR -- Value added reseller.
    

                                       47
<PAGE>

                     (THIS PAGE INTENTIONALLY LEFT BLANK)
<PAGE>

                         INDEX TO FINANCIAL STATEMENTS

                         US LEC CORP. AND SUBSIDIARIES




<TABLE>
<CAPTION>
                                                                                              Page
                                                                                             -----
<S>                                                                                          <C>
 INDEPENDENT AUDITORS' REPORT ............................................................    F-2
 FINANCIAL STATEMENTS:
  Consolidated Balance Sheets as of December 31, 1996 and 1997 ...........................    F-3
  Consolidated Statements of Operations for the Period From June 6, 1996 (Inception) to
   December 31, 1996 and the Year Ended December 31, 1997 ................................    F-4
  Consolidated Statements of Stockholders' Equity (Deficiency) for the Period From 
   June 6, 1996
   (Inception) to December 31, 1996 and the Year Ended December 31, 1997 .................    F-5
  Consolidated Statements of Cash Flows for the Period From June 6, 1996 (Inception) to
   December 31, 1996 and the Year Ended December 31, 1997 ................................    F-6
  Notes to Consolidated Financial Statements .............................................    F-7
</TABLE>


                                      F-1
<PAGE>

                         INDEPENDENT AUDITORS' REPORT



Board of Directors
US LEC Corp.
Charlotte, North Carolina

     We have audited the accompanying consolidated balance sheets of US LEC
Corp. (the "Company") and subsidiaries as of December 31, 1996 and 1997, and
the related consolidated statements of operations, stockholders' equity
(deficiency), and cash flows for the period from June 6, 1996 (inception) to
December 31, 1996 and the year ended December 31, 1997. These financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform our audits to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

     In our opinion, such financial statements present fairly, in all material
respects, the financial position of US LEC Corp. and subsidiaries as of
December 31, 1996 and 1997, and the results of their operations and their cash
flows for the period from June 6, 1996 (inception) to December 31, 1996 and the
year ended December 31, 1997 in conformity with generally accepted accounting
principles.



DELOITTE & TOUCHE LLP

February 4, 1998
Charlotte, North Carolina

                                      F-2
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES


                          CONSOLIDATED BALANCE SHEETS


                      December 31, 1996 and 1997 (Note 1)



   
<TABLE>
<CAPTION>
                                                                           1996             1997
                                                                      -------------   ---------------
<S>                                                                   <C>             <C>
  ASSETS (Note 4)
  CURRENT ASSETS:
    Cash and cash equivalents (Note 2) ............................    $  726,139      $  3,189,210
    Certificates of deposit (Note 2) ..............................            --           349,473
    Accounts receivable (Note 2) ..................................            --         6,005,742
    Due from stockholder (Note 6) .................................       200,000                --
    Prepaid expenses and other assets .............................       141,523           110,568
                                                                       ----------      ------------
     Total current assets ...................................... ..     1,067,662         9,654,993
  PROPERTY AND EQUIPMENT, NET (Notes 2 and 3) .....................       276,097        12,889,335
  OTHER ASSETS ....................................................       123,076           136,353
                                                                       ----------      ------------
  TOTAL ASSETS ....................................................    $1,466,835      $ 22,680,681
                                                                       ==========      ============
 
  LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIENCY)
  CURRENT LIABILITIES:
    Accounts payable ..............................................    $   48,125      $  8,200,926
    Deferred revenue ..............................................            --         1,141,386
    Accrued network costs .........................................            --         1,864,659
    Accrued interest payable -- related party .....................        16,861           282,311
    Accrued expenses -- other .....................................        65,792           434,594
                                                                       ----------      ------------
     Total current liabilities ................................. ..       130,778        11,923,876
                                                                       ----------      ------------
  NOTES PAYABLE -- STOCKHOLDERS (Notes 4 and 9) ...................     1,671,000         5,000,000
                                                                       ----------      ------------
  COMMITMENTS AND CONTINGENCIES (Note 5)
 
  STOCKHOLDERS' EQUITY (DEFICIENCY) (Notes 8 and 9):
    Common stock -- Class A, $.01 par value (73,405,498 authorized
     shares, 3,855,000 outstanding at December 31, 1997) ..........            --            38,550
    Common stock -- Class B, $.01 par value (16,594,502 authorized
     shares, 16,594,500 outstanding at December 31, 1997) .........            --           165,945
    Members' units -- voting (10,000 units outstanding as of
     December 31, 1996) ...........................................       600,000                --
    Members' units -- nonvoting (1,540 units outstanding as of
     December 31, 1996) ...........................................        27,720                --
    Additional paid-in capital ....................................            --        11,173,420
    Accumulated deficit ...........................................      (962,663)       (5,621,110)
                                                                       ----------      ------------
     Total stockholders' equity (deficiency) ................... ..      (334,943)        5,756,805
                                                                       ----------      ------------
  TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY
    (DEFICIENCY) ..................................................    $1,466,835      $ 22,680,681
                                                                       ==========      ============
</TABLE>
    

                See notes to consolidated financial statements.

                                      F-3
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES


                     CONSOLIDATED STATEMENTS OF OPERATIONS


                   The Period from June 6, 1996 (Inception)
      to December 31, 1996 and the Year Ended December 31, 1997 (Note 1)



   
<TABLE>
<CAPTION>
                                                                     1996             1997
                                                                -------------   ---------------
<S>                                                             <C>             <C>
  Revenue (Note 2) ..........................................   $       --       $  6,457,661
  Cost of Services ..........................................           --          4,201,001
                                                                ----------       ------------
  Gross Margin ..............................................           --          2,256,660
  Selling, General and Administrative .......................      941,743          6,117,337
  Depreciation and Amortization .............................        4,059            442,914
                                                                ----------       ------------
  Loss from Operations ......................................     (945,802)        (4,303,591)
  Interest Income ...........................................           --            (65,660)
  Interest Expense (Note 4) .................................       16,861            420,516
                                                                ----------       ------------
  Net Loss ..................................................   $ (962,663)      $ (4,658,447)
                                                                ==========       ============
  Net Loss Per Share -- Basic and diluted (Note 2) ..........   $     (.06)      $       (.25)
                                                                ==========       ============
  Weighted Average Shares Outstanding .......................   17,310,000         18,653,308
                                                                ==========       ============
</TABLE>
    

                See notes to consolidated financial statements.

                                      F-4
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES


         CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIENCY)


                   The Period from June 6, 1996 (Inception)
   to December 31, 1996 and the Year Ended December 31, 1997 (Notes 1 and 8)



   
<TABLE>
<CAPTION>
                                              Common Stock             Common Stock              Common Stock/
                                                 Class A                 Class B                Voting Units(1)
                                         ----------------------- ------------------------ ----------------------------
                                            Shares      Amount       Shares      Amount      Shares         Amount
                                         ------------ ---------- ------------- ---------- ------------ ---------------
<S>                                      <C>          <C>        <C>           <C>        <C>          <C>
 BALANCE, JUNE 6, 1996
 (INCEPTION) ...........................         --    $    --            --    $     --          --    $          --
 Issuance of voting shares/units .......         --         --            --          --      10,000          600,000
 Shares/units granted to employees .....         --         --            --          --          --               --
 Net loss ..............................         --         --            --          --          --               --
                                         ----------    -------    ----------    --------      ------    -------------
 BALANCE (DEFICIENCY),
 DECEMBER 31, 1996 .....................         --         --            --          --      10,000          600,000
 Issuance of nonvoting units ...........         --         --            --          --          --               --
 Issuance of voting units ..............         --         --            --          --       1,063        4,554,995
 Issuance of warrants ..................         --         --            --          --          --               --
 Contribution to capital ...............         --         --            --          --          --               --
 Exchange of limited liability
  company units for C Corporation
  shares ...............................  3,855,000     38,550    16,594,500     165,945     (11,063)      (5,154,995)
 Net loss ..............................         --         --            --          --          --               --
                                          ---------    -------    ----------    --------     -------    -------------
 BALANCE, DECEMBER 31, 1997 ............  3,855,000    $38,550    16,594,500    $165,945          --    $          --
                                          =========    =======    ==========    ========     =======    =============



<CAPTION>
                                                Common Stock/
                                             Nonvoting Units(1)        Additional
                                         ---------------------------     Paid-in      Accumulated
                                            Shares        Amount         Capital        Deficit          Total
                                         ----------- --------------- -------------- --------------- ---------------
<S>                                      <C>         <C>             <C>            <C>             <C>
 BALANCE, JUNE 6, 1996
 (INCEPTION) ...........................        --    $          --   $        --    $         --   $       --
 Issuance of voting shares/units .......        --               --            --              --      600,000
 Shares/units granted to employees .....     1,540           27,720            --              --       27,720
 Net loss ..............................        --               --            --        (962,663)    (962,663)
                                             -----    -------------   -----------    ------------   ----------
 BALANCE (DEFICIENCY),
 DECEMBER 31, 1996 .....................     1,540           27,720            --        (962,663)    (334,943)
 Issuance of nonvoting units ...........     1,030        4,413,550            --              --    4,413,550
 Issuance of voting units ..............        --               --            --              --    4,554,995
 Issuance of warrants ..................        --               --        70,800              --       70,800
 Contribution to capital ...............        --               --     1,710,850              --    1,710,850
 Exchange of limited liability
  company units for C Corporation
  shares ...............................    (2,570)      (4,441,270)    9,391,770              --           --
 Net loss ..............................        --               --            --      (4,658,447)  (4,658,447)
                                            ------    -------------   -----------    ------------   ----------
 BALANCE, DECEMBER 31, 1997 ............        --    $          --   $11,173,420    $ (5,621,110)  $5,756,805
                                            ======    =============   ===========    ============   ==========
</TABLE>
    

- -------
(1) On December 31, 1996, all S Corporation common shares were converted into
    limited liability company units based on a one-for-one conversion ratio of
    units for each share. On December 31, 1997, all limited liability units
    were converted into C Corporation common shares based upon a conversion
    ratio of 1,500 shares for each unit.


                See notes to consolidated financial statements.
 

                                      F-5
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES


                     CONSOLIDATED STATEMENTS OF CASH FLOWS


                   The Period from June 6, 1996 (Inception)
      to December 31, 1996 and the Year Ended December 31, 1997 (Note 1)



   
<TABLE>
<CAPTION>
                                                                                        1996              1997
                                                                                   --------------   ----------------
<S>                                                                                <C>              <C>
 OPERATING ACTIVITIES:
  Net loss .....................................................................    $   (962,663)     $ (4,658,447)
                                                                                    ------------      ------------
  Adjustments to reconcile net loss to net cash used in operating activities:
    Depreciation and amortization ..............................................           4,059           442,914
    Stock compensation .........................................................          27,720            70,800
    Changes in assets and liabilities which provided (used) cash:
     Accounts receivable .......................................................              --        (6,005,742)
     Prepaid expenses and other assets .........................................        (141,523)           30,955
     Other assets ..............................................................        (123,598)          (14,322)
     Accounts payable ..........................................................          34,283           899,452
     Deferred revenue ..........................................................              --         1,141,386
     Accrued expenses -- other .................................................          65,792           368,802
     Accrued network costs .....................................................              --         1,864,659
     Accrued interest payable -- related party .................................          16,861           265,450
                                                                                    ------------      ------------
      Total adjustments ........................................................        (116,406)         (935,646)
                                                                                    ------------      ------------
      Net cash used in operating activities ....................................      (1,079,069)       (5,594,093)
                                                                                    ------------      ------------
 INVESTING ACTIVITIES:
  Purchase of property and equipment ...........................................        (265,792)       (5,801,758)
  Certificates of deposit ......................................................              --          (349,473)
  (Advances to) repayments from stockholder ....................................        (200,000)          200,000
                                                                                    ------------      ------------
      Net cash used in investing activities ....................................        (465,792)       (5,951,231)
                                                                                    ------------      ------------
 FINANCING ACTIVITIES:
  Issuance of common shares and limited liability company units ................         600,000         8,968,545
  Contribution to capital ......................................................              --         1,710,850
  Proceeds from notes payable -- stockholders ..................................       1,671,000         4,289,150
  Repayment of notes payable -- stockholders ...................................              --          (960,150)
                                                                                    ------------      ------------
      Net cash provided by financing activities ................................       2,271,000        14,008,395
                                                                                    ------------      ------------
 NET INCREASE IN CASH AND CASH EQUIVALENTS .....................................         726,139         2,463,071
 CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD ................................              --           726,139
                                                                                    ------------      ------------
 CASH AND CASH EQUIVALENTS, END OF PERIOD ......................................    $    726,139      $  3,189,210
                                                                                    ============      ============
 SUPPLEMENTAL CASH FLOW DISCLOSURES -- Cash paid for interest ..................    $         --      $        672
                                                                                    ============      ============
 SUPPLEMENTAL NON CASH INVESTING AND FINANCING
 ACTIVITIES -- During 1997, accrued interest of $54,544 due to stockholders
 was converted into voting equity. At December 31, 1996 and 1997, $13,842
 and $7,267,191, respectively, of property and equipment additions are
 included in outstanding accounts payable.
</TABLE>
    

                See notes to consolidated financial statements.

                                      F-6
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES


                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Period From June 6, 1996 (Inception) to December 31, 1996 and Year Ended
                               December 31, 1997


1. ORGANIZATION AND NATURE OF BUSINESS

     The consolidated financial statements include the accounts of US LEC Corp.
(the "Company") and its six subsidiaries, of which two are wholly owned and
four are 99% owned. All significant intercompany transactions and balances have
been eliminated. The Company was incorporated in 1996 as an S Corporation.
Effective December 31, 1996, US LEC Corp. was converted to a limited liability
company ("US LEC L.L.C.") through an exchange of the S Corporation common stock
for voting and nonvoting units of US LEC L.L.C. On December 31, 1997, in
anticipation of a planned initial public offering of common stock, the Company
became a C Corporation through a merger of US LEC L.L.C. into the Company and
the exchange of all of the limited liability company units into shares of Class
A and Class B Common Stock.

     The Company, through its subsidiaries, provides switched local, long
distance and enhanced telecommunications services primarily to medium and
large-sized organizations in selected markets in the southeastern United
States. The Company was a development stage enterprise from inception until
March 1997, when it began generating telecommunications revenues.


2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     Revenue Recognition -- The Company recognizes revenue on
telecommunications and enhanced communications services in the period that the
service is provided. Revenue is presented net of amounts which are rebated to
end user customers and outside sales agents pursuant to telecommunications
service contracts. Revenue on billings to customers in advance of providing
services is deferred and recognized when earned. At December 31, 1997, deferred
revenue primarily represents billings which are subject to review by a state
public utilities commission (see Note 5).

     Cash and Cash Equivalents -- Cash equivalents consist of highly liquid
investments with original maturities of three months or less at the time of
purchase.

     Certificates of Deposit -- Certificates of deposit are carried at cost.
These certificates mature during 1998, and serve as collateral for letters of
credit related to certain office leases.

     Property and Equipment -- Property and equipment is stated at cost less
accumulated depreciation. Depreciation is computed using the straight-line
method over the estimated useful lives of the assets.

     The estimated useful lives of the Company's principal classes of property
and equipment are as follows:


<TABLE>
<S>                                                      <C>
       Telecommunications switching and other
         equipment ...................................   5 - 9 years
       Office equipment, furniture and other .........   5 years
       Leasehold improvements ........................   The lesser of the estimated useful lives
                                                         or the term of the lease
</TABLE>

     Long-Lived Assets -- The Company reviews the carrying value of its
long-lived assets for impairment whenever events or changes in circumstances
indicate that the carrying value of these assets may not be recoverable.
Measurement of any impairment would include a comparison of estimated future
operating cash flows anticipated to be generated during the remaining life of
the assets with their net carrying value. An impairment loss would be
recognized as the amount by which the carrying value of the assets exceeds
their fair value.

     Fair Value of Financial Instruments -- As of December 31, 1996 and 1997,
the fair values of the Company's financial instruments, including cash
equivalents, certificates of deposit, receivables, accounts payable and notes
payable to stockholders approximate their carrying values.

     Income Taxes -- The Company was organized as an S Corporation for the
period from inception to December 31, 1996, and as a limited liability company
for the period from January 1, 1997 to December 31, 1997, on which date it was
converted to C Corporation status. Accordingly, no provision (benefit) for
income taxes is


                                      F-7
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  -- Continued

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- Continued

necessary for 1996 and 1997 since income taxes were the responsibility of the
individual S Corporation stockholders or limited liability company members. On
a pro forma basis, had the Company been structured as a C Corporation since
inception, there would have been no change in the net loss or net loss per
share for each period presented. At December 31, 1997, deferred tax assets and
liabilities related to the conversion to a C Corporation are not significant.

     Concentration of Risk -- The Company is exposed to concentration of credit
risk principally from trade accounts receivable. At December 31, 1997, the
Company's trade customers are located in North Carolina. The Company performs
ongoing credit evaluations of its customers but does not require collateral to
support customer receivables. Credit risk is reduced by the fact that the
Company's most significant trade receivables are from large, well-established
telecommunications entities. At December 31, 1997, no allowance for doubtful
receivables is considered necessary.

     The Company is dependent upon certain suppliers for the provision of
telecommunications services to its customers. The Company has executed
interconnection agreements for all of its current operating networks, and these
agreements expire at various dates in 1998 and 1999. Management believes that
suitable interconnection agreements can be negotiated in the future and,
accordingly, does not expect any disruption of services.

     Use of Estimates -- The preparation of financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and the disclosure of contingent assets and liabilities at the date
of the financial statements. Actual results could differ from those estimates.
A significant estimate relates to the accrual of network costs payable to other
telecommunications entities. Any difference between the ultimate payments made
and the accrual would be recorded at the time of payment.

     Advertising -- The Company expenses advertising costs in the period
incurred. Advertising expense amounted to $22,311 and $136,935 for 1996 and
1997, respectively.

     Net Loss Per Share -- Net loss per share has been calculated in accordance
with Statement of Financial Accounting Standards ("SFAS") No. 128, Earnings Per
Share. The weighted average shares outstanding used in the calculation have
been determined by giving retroactive effect to the conversion to C Corporation
status which occurred on December 31, 1997 (based on the share conversion
ratios utilized in the conversion from a limited liability company). The effect
on diluted loss per share of outstanding stock warrants to purchase 444,000
common shares is antidilutive for the year ended December 31, 1997. Securities
and Exchange Commission Staff Accounting Bulletin No. 98 requires that equity
instruments granted at nominal amounts for periods prior to the filing of the
registration statement be included in the calculation of per share data as if
outstanding for all periods presented. Accordingly, the weighted average shares
used in the calculation of basic and diluted loss per share in 1996 includes
2,310,000 shares (1,540 limited liability company units) granted in 1996 to
employees, as if such shares were outstanding for the entire period.


3. PROPERTY AND EQUIPMENT



<TABLE>
<CAPTION>
                                                                           December 31,
                                                                   ----------------------------
                                                                       1996           1997
                                                                   -----------   --------------
<S>                                                                <C>           <C>
      Telecommunications switching and other equipment .........    $212,259      $11,790,370
      Office equipment, furniture and other ....................      67,375          774,536
      Leasehold improvements ...................................          --          769,835
                                                                    --------      -----------
                                                                     279,634       13,334,741
      Less accumulated depreciation and amortization ...........      (3,537)        (445,406)
                                                                    --------      -----------
      Total ....................................................    $276,097      $12,889,335
                                                                    ========      ===========
</TABLE>

                                      F-8
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  -- Continued


4. NOTES PAYABLE -- STOCKHOLDERS

   
     The Company's majority stockholder has loaned an aggregate of $5,000,000
to the Company as of December 31, 1997 ($710,850 as of December 31, 1996).
Interest charged through 1997 was at prime plus 2% (10.5% per annum at December
31, 1997). In January 1998, an entity controlled by this stockholder loaned an
additional $2,289,150 to the Company. Interest on both loans will be at 12% per
annum, payable on a quarterly basis, with principal due in January 2003. (See
Note 9)
    

     Another stockholder loaned the Company an aggregate of $960,150 in 1996,
with interest at prime plus 2%. These loans were repaid in 1997. In January
1998, this stockholder loaned $1,000,000 to the Company, with interest at 12%
per annum, payable on a quarterly basis, with principal due in January 2003.

     Substantially all of the Company's assets are pledged as collateral on
such stockholder loans. Interest expense to related parties was $16,861 in 1996
and $419,814 in 1997.


5. COMMITMENTS AND CONTINGENCIES

     Leases -- The Company leases office premises in various locations under
operating lease arrangements. Most of these leases have renewal options. Total
rent expense amounted to $12,331 and $180,414 in 1996 and 1997, respectively.

     Future minimum rental payments under operating leases having initial or
remaining noncancelable lease terms in excess of one year (including leases
entered into in 1998) are as follows:


<TABLE>
<S>                        <C>
  1998 .................    $  795,000
  1999 .................       901,000
  2000 .................       813,000
  2001 .................       700,000
  2002 .................       609,000
  Thereafter ...........       578,000
                            ----------
  Total ................    $4,396,000
                            ==========
</TABLE>

     Purchase Commitments -- At December 31, 1997, the Company has outstanding
commitments to purchase network equipment with an aggregate cost of $8,844,880.
 

     FCC Subsidy -- On May 8, 1997, the FCC released an order establishing a
significantly expanded federal telecommunications universal service program
which both increased the size of existing subsidies and created new subsidy
funds with respect to certain services offered in high-cost areas or to low
income subscribers, schools, libraries, and rural healthcare providers. In the
May 8 order, the FCC also announced that it will soon revise its rules for
subsidizing service provided to consumers in high cost areas. The Company also
may be required to contribute to state-established funds. As of December 31,
1997, the Company was unable to quantify the subsidy payments it may be
required to make for the year. However, management believes that any such
subsidy payments relating to periods through 1997 will not have a material
effect on the Company's financial position or results of operations.

     BellSouth Proceeding -- A portion of the Company's revenue is derived from
reciprocal compensation payments from incumbent local exchange carriers
("ILEC's") such as BellSouth Telecommunications, Inc. ("BellSouth"). Management
believes that such payments are due pursuant to its ILEC interconnection
agreements when, in the aggregate, the Company's customers receive more calls
from the ILEC's customers than they make to the ILEC's customers. However, in
August 1997 BellSouth indicated that it was not obligated to make such payments
to the Company with respect to calls made to certain customers, principally
internet service providers. In October 1997, the Company filed a petition with
the public utilities commission ("PUC") in North Carolina seeking an order to
compel BellSouth to make the reciprocal compensation payments. It is expected
that the PUC will issue a


                                      F-9
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  -- Continued

5. COMMITMENTS AND CONTINGENCIES -- Continued

ruling in the first quarter of 1998, but such ruling may be subject to appeal.
Management believes that the Company will ultimately be successful in this
proceeding, but a final determination that the Company is not eligible for
reciprocal compensation with respect to such calls could have a material
adverse effect on the Company's financial condition and future results of
operations.

     Since reciprocal compensation earned during 1997 is subject to the ruling
to be issued by the PUC in North Carolina, the Company has deferred recognition
of a significant portion ($1,141,386) of such revenue at December 31, 1997.


6. RELATED PARTIES

     During the year ended December 31, 1997, the Company received services
under consulting agreements with two entities each controlled by Company
stockholders. Payments under these agreements totaled $175,000, comprised of
$125,000 and $50,000, respectively. Company management believes that these
transactions were under terms no less favorable to the Company than could be
arranged with unrelated parties. In 1996 the Company advanced $200,000 to its
majority stockholder. The amount was repaid in January 1997.


7. EMPLOYEE BENEFIT PLAN

     The Company has a 401(k) profit-sharing plan under which employees can
contribute up to 15% of their annual salary. Employees are eligible for
participation after completing 1,000 hours of service within a 12-month period.
The Company may make a discretionary contribution. However, no such
contributions have been made for the period from inception to December 31,
1997.


8. STOCKHOLDERS' EQUITY

     Common Stock -- The Company has authorized two classes of common stock,
Class A and Class B. The rights of holders of the Class A Common Stock and the
Class B Common Stock are substantially identical, except that (i) holders of
the Class A Common Stock are entitled to one vote per share and holders of the
Class B Common Stock are entitled to 10 votes per share; (ii) holders of the
Class B Common Stock vote as a separate class to elect two members of the
Company's Board of Directors in addition to voting with the holders of Class A
Common Stock in the election of the other members of the Board of Directors;
and (iii) the Class B Common Stock is fully convertible at any time into Class
A Common Stock, at the option of the holder, or automatically upon transfer to
certain third persons, on a one-for-one basis. Pursuant to an agreement among
the Class B stockholders, if a Class B stockholder proposes to sell or transfer
Class B Common Stock to anyone other than a permitted transferee (as defined in
the agreement), the other Class B stockholders who are parties to the agreement
would have a right to acquire the Class B Common Stock that is proposed to be
sold or transferred.

     Preferred Stock -- The Company is authorized to issue 10,000,000 shares of
preferred stock ($.01 par value) in one or more series without stockholder
approval, subject to any limitations prescribed by law. Each series of
preferred stock shall have such rights and preferences as shall be determined
by the Company's Board of Directors. No shares of preferred stock have been
issued.

     Capital Contribution -- During 1997, the Company's majority stockholder
contributed an aggregate of $1,710,850 to additional paid-in capital.

     Employee Stock Grants -- In 1996, as part of the Company's organizational
activities, an aggregate of 1,540 non-voting limited liability company units
were issued to induce certain employees to join the Company. The Company
recorded compensation expense of $27,720 in 1996 for these units, based on the
estimated fair value at the time the units were issued.


                                      F-10
<PAGE>

                         US LEC CORP. AND SUBSIDIARIES

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  -- Continued

8. STOCKHOLDERS' EQUITY -- Continued

     Warrants -- During 1997, the Company issued warrants to three employees to
purchase an aggregate of 345,000 shares of Class A Common Stock and a warrant
to an outside sales agent to purchase 99,000 shares of Class A Common Stock.
All of these warrants are fully vested and are exercisable at $2.86 per share
for a three-year period from the date of issuance. None of these warrants have
been exercised at December 31, 1997.

   
     Management believes that the employee warrants issued through October 1997
are noncompensatory based upon an internal valuation of their fair value. The
exercise price of those warrants is the same as the issuance price in 1997 of
shares to numerous outside investors. In November 1997, the Company granted to
an employee, warrants to purchase 15,000 shares of Class A Common Stock at an
exercise price of $2.86 per share. Management estimated the fair value of these
warrants granted in November to be $6.00 per share. As a result, compensation
of $47,100 has been charged to expense relating to the difference between the
fair value and the exercise price of the warrants on the date of grant. In
addition, in January 1998 the Company issued a warrant to a consultant to
purchase 25,000 shares of Class A Common Stock at $10 per share, exercisable at
any time through January 1, 2001. The Company will record compensation expense
of $75,000 in the first quarter of 1998 associated with the warrant issued in
January 1998.

     Had compensation cost for the employee warrants issued in 1997 been
determined based on the fair value at the grant date in accordance with SFAS
No. 123, Accounting for Stock-Based Compensation, the Company's 1997 net loss
and net loss per share would have been $4,737,436 and $.25, respectively. The
Company estimated the fair value of the warrants using the Black-Scholes model
assuming no dividend yield or volatility, a risk-free interest rate of 6.0% and
an expected life of 18 months for each of the warrants. For the warrant issued
in 1997 to the outside sales agent, the fair value charged to expense was
$23,700. The weighted average remaining contractual life of warrants
outstanding at December 31, 1997 is 32 months.
    

     Stock Option Plan --  In January 1998, the Company adopted the US LEC
Corp. 1998 Omnibus Stock Plan (the "Stock Plan"). Under this plan, 650,000
shares of Class A Common Stock have been reserved for issuance of stock
options, stock appreciation rights, restricted stock, performance awards or
other stock-based awards. Options granted under the Stock Plan are to be at
exercise prices as determined by the Compensation Committee of the Board of
Directors. For incentive stock options the option price may not be less than
the market value of the Class A Common Stock on the date of grant (110% of
market value for greater than 10% stockholders).

   
     In January 1998, the Company granted incentive stock options to
substantially all employees to purchase an aggregate of 182,800 shares of Class
A Common Stock at $10 per share, which options vest annually in four equal
installments beginning in January 1999. The Company will record deferred
compensation of $548,400 in the first quarter of 1998 associated with these
options which will be amortized, beginning in the first quarter of 1998, to
compensation expense over the four-year vesting period. Also, upon completion
of a planned initial public offering of the Class A Common Stock, the Company
intends to grant nonqualified options to purchase 5,000 shares of Class A
Common Stock at the initial public offering price to each of the Company's two
outside directors.


9. SUBSEQUENT EVENT (UNAUDITED)

     On February 14, 1998, the Company's majority stockholder exchanged
$5,000,000 of loans to the Company for 480,770 shares of Class B Common Stock.
The fair value of the Class B Common Stock issued in the exchange was
$1,250,000 in excess of the carrying value of the debt. Accordingly, the
difference between the carrying value of the debt and the fair value of the
Class B Common Stock issued in the exchange will be recorded as a dividend to
the majority shareholder in the first quarter of 1998.
    

                                    ********

                                      F-11
<PAGE>

                      (THIS PAGE INTENTIONALLY LEFT BLANK)
<PAGE>

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

       No dealer, salesperson or any other person has been authorized to give
any information or to make any representations other than those contained in
this Prospectus in connection with the offer contained herein, and, if given or
made, such information or representations must not be relied upon as having
been authorized by the Company or by any of the Underwriters. This Prospectus
does not constitute an offer of any securities other than those to which it
relates or an offer to sell, or a solicitation of an offer to buy, those to
which it relates in any state to any person to whom it is not lawful to make
such offer in such state. The delivery of this Prospectus at any time does not
imply that the information herein is correct as of any time subsequent to its
date.
                          --------------------------
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                 Page
                                                              ---------
<S>                                                           <C>
Prospectus Summary ........................................        1
Risk Factors ..............................................        7
Use of Proceeds ...........................................       13
Dividend Policy ...........................................       13
Dilution ..................................................       13
Capitalization ............................................       14
Selected Historical Consolidated Financial and
   Operating Data .........................................       15
Management's Discussion and Analysis of
   Financial Condition and Results of Operations ..........       17
Business ..................................................       20
Management ................................................       34
Certain Relationships and Related Transactions ............       37
Security Ownership of Management ..........................       38
Description of Capital Stock ..............................       39
Shares Eligible for Future Sale ...........................       42
Underwriting ..............................................       43
Legal Matters .............................................       45
Experts ...................................................       45
Available Information .....................................       45
Glossary ..................................................       46
Index to Financial Statements .............................      F-1
</TABLE>

Until          , 1998 (25 days after the commencement of the Offering), all
dealers effecting transactions in the Class A Common Stock, whether or not
participating in this distribution, may be required to deliver a Prospectus.
This is in addition to the obligation of dealers to deliver a Prospectus when
acting as Underwriters and with respect to their unsold allotments or
subscriptions.
 

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------


   
                               5,500,000 Shares



                                 US LEC Corp.

                             Class A Common Stock



                                 (US LEC LOGO)

                                  
 
    
                               -----------------
                                   PROSPECTUS


                              Dated        , 1998


                               -----------------
                             Salomon Smith Barney

                           Bear, Stearns & Co. Inc.


                               Wheat First Union


<PAGE>

                PART II. INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance And Distribution.

     The following is a list of the estimated expenses to be incurred by US LEC
Corp. (the "Company" or the "Registrant") in connection with the distribution
of the Class A Common Stock being registered hereby. Except for the Securities
and Exchange Commission Registration Fee, the NASD Filing Fee and the Nasdaq
National Market Listing Fee, all amounts are estimates.


   
<TABLE>
<S>                                                                 <C>
    Securities and Exchange Commission Registration Fee .........    $ 27,989
    NASD Filing Fee .............................................       9,988
    Nasdaq National Market Listing Fee ..........................      75,625
    Printing and Engraving Costs ................................      90,000
    Accounting Fees and Expenses ................................     200,000
    Legal Fees and Expenses (excluding Blue Sky) ................     225,000
    Transfer Agent and Registrar Fees ...........................      10,000
    Miscellaneous ...............................................      11,398
                                                                     --------
    Total .......................................................    $650,000
                                                                     ========
</TABLE>
    

Item 14. Indemnification of Directors and Officers.

     Certain provisions of the Company's Certificate of Incorporation (the
"Certificate") and Bylaws provide that the Company shall indemnify all of its
directors and officers to the fullest extent permitted by the General
Corporation Law of the State of Delaware (the "Delaware Law"). In addition, the
Certificate authorizes the Registrant to enter into one or more agreements with
any person which provide for indemnification greater or different than that
provided in its Certificate.

     Section 145 of the Delaware Law permits a corporation to indemnify its
directors and officers against expenses (including attorney's fees), judgments,
fines and amounts paid in settlements actually and reasonably incurred by them
in connection with any action, suit or proceeding, whether criminal or civil,
brought by a third party if such directors or officers acted in good faith and
in a manner they reasonably believed to be in or not opposed to the best
interests of the corporation and, with respect to any criminal action or
proceeding, had no reason to believe their conduct was unlawful. In a
derivative action, indemnification may be made only for expenses actually and
reasonably incurred by directors and officers in connection with the defense or
settlement of an action or suit and only with respect to a matter as to which
they shall have acted in good faith and in a manner they reasonably believed to
be in or not opposed to the best interest of the corporation, except that no
indemnification shall be made if such person shall have been adjudged liable to
the corporation, unless and only to the extent that the court in which the
action or suit was brought shall determine upon application that the defendant
officers or directors are reasonably entitled to indemnity for such expenses
despite such adjudication of liability.

     In addition, Section 102 of the Delaware Law provides that a corporation
may include in its certificate of incorporation a provision eliminating or
limiting the personal liability of directors for monetary damages for breach of
fiduciary duty, provided that such provision shall not eliminate or limit the
liability of a director: (i) for any breach of the director's duty of loyalty
to the corporation or its stockholders; (ii) for acts or omissions not in good
faith that involve intentional misconduct or a knowing violation of the law;
(iii) conduct in violation of Section 174 of the Delaware Law (which section
relates to unlawful distributions); or (iv) for any transaction from which the
director derived an improper personal benefit. The Certificate currently
includes such provisions.

     Reference is also hereby made to Section 8 of the Underwriting Agreement,
a copy of which is filed as Exhibit 1 to this Registration Statement, for
information concerning indemnification arrangements among the Company and the
Underwriters.


Item 15. Recent Sales of Unregistered Securities.
     On December 31, 1997, US LEC L.L.C., a Delaware limited liability company,
was merged into the Company (the "Merger"). As a result of the Merger, the
Company issued (i) 3,855,000 shares of Class A Common


                                      II-1
<PAGE>

Stock to the holders of all outstanding nonvoting units of membership interest
in US LEC L.L.C (the "Nonvoting Units"), (ii) 16,594,500 shares of Class B
Common Stock to the holders of all outstanding voting units of membership
interest in US LEC L.L.C. (the "Voting Units") and (iii) warrants to purchase
444,000 shares of Class A Common Stock to the holders of all outstanding
warrants to purchase Nonvoting Units (the "Warrants"). Immediately prior to the
Merger, the 2,570 outstanding Nonvoting Units were beneficially owned by a
total of 53 persons, including employees of US LEC L.L.C. and private
investors, the 11,063 outstanding Voting Units were beneficially owned by
Messrs. Aab and Ganatra and the Warrants were held by three employees and a
sales agent of US LEC L.L.C. The transaction was not registered under the
Securities Act pursuant to the exemption provided by Section 4(2) thereof for
transactions not involving any public offering.
     In January 1998, the Company granted incentive stock options to 96
employees covering 182,800 shares of Class A Common Stock. These transactions
were not registered under the Securities Act pursuant to the exemption provided
by Rule 701 promulgated thereunder for sales of securities pursuant to
     compensatory benefit plans.  In February, 1998, Mr. Aab exchanged a note
payable by Company to him in the amount of $5,000,000 for 480,770 shares of
Class B Common Stock. The transaction was not registered under the Securities
Act pursuant to the exemption provided by Section 4(2) thereof for transactions
not involving any public offering.

Item 16. Exhibits and Financial Statement Schedules.
     (a) Exhibits:


   
<TABLE>
<CAPTION>
 Exhibit No.    Description
- -------------   ----------------------------------------------------------------------------------------
<S>             <C>
   1            Form of Underwriting Agreement**
 3.1            Form of Restated Certificate of Incorporation of the Company
 3.2            Bylaws of the Company*
 3.3            Amendment No. 1 to By-laws of the Company
   4            Form of Class A Common Stock Certificate
   5            Opinion of Moore & Van Allen, PLLC
10.1            US LEC Corp. 1998 Omnibus Stock Plan*
10.2            Promissory Note, dated January 16, 1998, made by the Company to Melrich Associates,
                L.P.
10.3            Security Agreement, dated January 16, 1998, by and between the Company and Melrich
                Associates, L.P.
10.4            Promissory Note, dated January 16, 1998, made by the Company to Tansukh V. Ganatra
10.5            Security Agreement, dated January 16, 1998, by and between the Company and
                Tansukh V. Ganatra
10.6            Guaranty and Suretyship Agreement, dated January 16, 1998, by and among the
                Company and Richard T. Aab, Melrich Associates, L.P. and Tansukh V. Ganatra
10.7            Contribution Agreement, dated February 14, 1998, by and between US LEC Corp. and
                Richard T. Aab
10.8            Non-transferable Warrant, dated August 4, 1997, issued to David N. Vail*
10.9            Non-transferable Warrant, dated August 4, 1997, issued to Craig K. Simpson*
10.10           Form of Amended and Restated Class B Stockholders Agreement, dated as of January 1, 1998
10.11           Consulting Agreement, dated December 18, 1997 by and between the Company and
                RTA Associates, LLC and related termination letter, dated January 1, 1998
10.12           Consulting Agreement, dated December 18, 1997 by and between the Company and
                Super STAR Associates Limited Partnership and related termination letter, dated January
                1, 1998
  21            Subsidiaries of the Registrant
23.1            Consent of Deloitte & Touche LLP
23.2            Consent of Moore & Van Allen, PLLC (included in its opinion filed as Exhibit 5)
  24            Power of Attorney*
</TABLE>
    

- ----------
   
*  Previously filed.
** To be filed by amendment.
    

                                      II-2
<PAGE>

Item 17. Undertakings.

     The undersigned Registrant hereby undertakes that:

     (1) For purposes of determining any liability under the Securities Act of
1933, the information omitted from the form of Prospectus filed as part of this
Registration Statement in reliance upon Rule 430A and contained in a form of
Prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this Registration
Statement as of the time it was declared effective;

     (2) For the purpose of determining any liability under the Securities Act
of 1933, each post-effective amendment that contains a form of Prospectus shall
be deemed to be a new Registration Statement relating to the securities offered
therein, and the offering of such securities at that item shall be deemed to be
the initial bona fide public offering thereof; and

     (3) The undersigned Registrant hereby undertakes to provide to the
Underwriters at the closing specified in the Underwriting Agreement,
certificates in such denominations and registered in such names as required by
the Underwriters to permit prompt delivery to each purchaser.

     Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Securities Act of 1933 and is, therefore, unenforceable. In the event that a
claim for indemnification against such liabilities (other than the payment by
the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act of 1933 and will be governed by the final adjudication of such
issue.


                                      II-3
<PAGE>

   
                                  SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Charlotte, State of
North Carolina, on April 4, 1998.
    

                                            US LEC Corp.



                                               By: /s/  DAVID N. VAIL
   
                                               --------------------------------

                                               David N. Vail,

                                               Executive Vice President --
                                               Finance and
                                               Chief Financial Officer
    

     In accordance with the requirements of the Securities Act of 1933, this
Registration Statement was signed by the following persons in the capacities
and on the dates stated:




   
<TABLE>
<CAPTION>
              Signature                                  Title                          Date
- ------------------------------------   -----------------------------------------   --------------
<S>                                    <C>                                         <C>
  /s/  RICHARD T. AAB*                 Chairman of the Board of Directors,         April 4, 1998
  -------------------------------
               Richard T. Aab          Chief Executive Officer and Director
  /s/  TANSUKH V. GANATRA*             President, Chief Operating Officer and      April 4, 1998
  -------------------------------
             Tansukh V. Ganatra        Director
  /s/  DAVID N. VAIL                   Executive Vice President -- Finance and     April 4, 1998
  -------------------------------
                David N. Vail          Chief Financial Officer (Principal
                                       Accounting Officer)
  /s/  DAVID M. FLAUM*                 Director                                    April 4, 1998
  -------------------------------
               David M. Flaum
  /s/  STEVEN L. SCHOONOVER*           Director                                    April 4, 1998
  -------------------------------
            Steven L. Schoonover
     *By: /s/    DAVID N. VAIL
     ---------------------------
      David N. Vail
     Attorney-in-Fact
</TABLE>
    

 

                                      II-4





                      RESTATED CERTIFICATE OF INCORPORATION

                                       OF

                                  US LEC CORP.


         US LEC Corp., a corporation organized and existing under the laws of
the State of Delaware, hereby certifies as follows:

                                       I.

         1. The name of the Corporation is US LEC Corp. The Corporation was
originally incorporated under the same name, and the original Certificate of
Incorporation of the Corporation was filed with the Secretary of State of the
State of Delaware on December 29, 1997.

         2. Pursuant to Sections 242 and 245 of the General Corporation Law of
the State of Delaware, this Restated Certificate of Incorporation restates and
integrates and further amends the provisions of the Certificate of Incorporation
of the Corporation.

         3. The text of the Restated Certificate of Incorporation as heretofore
amended or supplemented is hereby restated and further amended to read in its
entirety as follows.

                                       II.

         The address of the Corporation's registered office in the State of
Delaware is The Corporation Trust Center, 1209 Orange Street, in the City of
Wilmington, County of New Castle. The name of the Corporation's registered agent
at such address is The Corporation Trust Company.

                                      III.

         The nature of the business or purposes to be conducted or promoted by
the Corporation is to engage in any lawful act or activity for which
corporations may be organized under the General Corporation Law of the State of
Delaware.

                                       IV.

         1. The total number of shares of all stock which the Corporation shall
have the authority to issue is One Hundred Million shares (100,000,000),
consisting of Ten Million (10,000,000) shares of Preferred Stock, $.01 par value
per share, and Ninety Million (90,000,000) shares of Common Stock. The Common
Stock shall be divided into two (2) classes as follows:

                  (a) Seventy-Two Million Nine Hundred Twenty-Four Thousand
         Seven Hundred Twenty-Eight (72,924,728) shares of Class A Common Stock,
         $.01 par value per share ("Class A Common"); and



<PAGE>

                  (b) Seventeen Million Seventy-Five Thousand Two Hundred
         Seventy-Two (17,075,272) shares of Class B Common Stock, $.01 par value
         per share ("Class B Common").

         2.       Common Stock.

                  (a) Rights Generally. Except as provided herein, all shares of
         Class A Common and Class B Common (together, the "Common Stock") shall
         be identical and entitle the holders thereof to the same rights and
         privileges.

                  (b) Dividends and Stock Splits. Whenever dividends upon
         Preferred Stock at the time outstanding, to the extent of any
         preference to which such stock is entitled, shall have been paid in
         full, or declared and set apart for payment, for all current and, if
         such Preferred Stock shall have cumulative rights, all past dividend
         periods, and after the provisions for any sinking or purchase fund or
         funds for any series of Preferred Stock shall have been complied with,
         the Board of Directors may declare and pay dividends on the Common
         Stock, payable in cash or otherwise, and the holders of shares of
         Preferred Stock shall not be entitled to share therein, subject to the
         certificate of designation for any outstanding series of Preferred
         Stock, provided that, if dividends are declared on the Common Stock
         which are payable in shares of Common Stock, dividends shall be
         declared which are payable at the same rate on both classes of Common
         Stock with dividends payable in shares of Class A Common payable to
         holders of shares of Class A Common and dividends payable in shares of
         Class B Common shall be payable to holders of shares of Class B Common;
         and provided further, that no dividends payable in shares of Class A
         Common or Class B Common shall be declared unless an adequate number of
         authorized but unissued shares of Class A Common or Class B Common, as
         applicable, is available as of the date of such declaration. No split
         of the Class A Common may occur unless the Class B Common are split in
         the same manner and no split of the Class B Common may occur unless the
         Class A Common are split in the same manner.

                  (c) Liquidation. In the event of any liquidation, dissolution
         or winding up of the Corporation or upon the distribution of assets of
         the Corporation, all assets and funds of the Corporation remaining,
         after the payment to the holders of Preferred Stock of the full
         preferential amounts to which they shall be entitled pursuant to the
         certificate of designation for such series of Preferred Stock, shall be
         divided and distributed among the holders of the Common Stock ratably.

                  (d) Voting. Except as otherwise required by law, the holders
         of Class A Common shall be entitled to one (1) vote per share on all
         matters to be voted on by the stockholders of the Corporation and the
         holders of Class B Common shall be entitled to ten (10) votes per share
         on all matters to be voted on by the stockholders of the Corporation.
         Except as otherwise provided by law and as otherwise provided in
         Article VI.2 below with respect to the election of the Class B
         Directors (as defined below), the holders of Class A 

                                       2

<PAGE>

         Common and the holders of Class B Common shall vote as a single class
         on all matters that are submitted to the stockholders for a vote.

                  (e)      Conversion.

                           (i) Mandatory Conversion. Upon the sale, distribution
                  or disposition of any or all of the shares of Class B Common
                  held by Richard T. Aab ("Aab"), Melrich Associates, L.P.,
                  ("Melrich"), Tansukh V. Ganatra ("Ganatra"), Super STAR
                  Associates Limited Partnership ("STAR") or any Permitted
                  Transferee (as defined clause (f) below) to any party other
                  than to, between or among Aab, Melrich, Ganatra, STAR
                  (collectively, the "Initial Holders") or a Permitted
                  Transferee, each share so sold, distributed or disposed of
                  shall immediately be converted into one fully paid and
                  nonassessable share of Class A Common (a "Mandatory
                  Conversion").

                           Each such Mandatory Conversion shall be carried out
                  as follows: Concurrently with the occurrence of a transfer
                  giving rise to a Mandatory Conversion, the transferor shall
                  surrender for conversion into Class A Common the certificate
                  or certificates representing the Class B Common shares
                  transferred at the principal office of the Corporation at any
                  time during normal business hours, together with a written
                  notice stating that such transferor has transferred the
                  shares, or a stated number of the shares, of Class B Common
                  represented by such certificate or certificates to a
                  transferee other than an Initial Holder or a Permitted
                  Transferee. Such notice shall also state the name or names
                  (with addresses) of the transferee of such shares, which shall
                  also be the name in which the shares of Class A Common will be
                  issued. Regardless of when the surrender of certificates
                  representing the transferred shares of Class B Common and the
                  accompanying notice are received by the Corporation, the
                  Mandatory Conversion shall be deemed to have been effected on
                  and as of the date of such transfer of the shares of Class B
                  Common, and at such time the rights of the transferor of the
                  converted shares of Class B Common as a holder of such shares
                  shall cease and the person or persons in whose name or names
                  the certificate or certificates for such shares of Class A
                  Common are to be issued shall be deemed to have become the
                  holder or holders of record of the shares of Class A Common
                  represented thereby.

                           (ii) Elective Conversion. At the election of any
                  Initial Holder, or a Permitted Transferee then holding shares
                  of Class B Common, each share of Class B Common shall be
                  convertible at any time into one fully paid and nonassessable
                  share of Class A Common (an "Elective Conversion").

                           Each such Elective Conversion of shares of Class B
                  Common into shares of Class A Common shall be effected by the
                  surrender of the certificate or certificates representing the
                  shares to be converted at the principal office of the
                  Corporation at any time during normal business hours, together
                  with a written notice stating that such holder desires to
                  convert the shares, or a stated number of the shares, of Class

                                       3

<PAGE>


                  B Common represented by such certificate or certificates into
                  shares of Class A Common. Such notice shall also state the
                  name or names (with addresses) and denominations in which the
                  certificate or certificates for such Class A Common are to be
                  issued. Such conversion shall be deemed to have been effected
                  as of the close of business on the date on which such
                  certificate or certificates have been surrendered and such
                  notice has been received, and at such time the rights of the
                  holder of the converted shares of Class B Common as such
                  holder shall cease and the person or persons in whose name or
                  names the certificate or certificates for such shares of Class
                  A Common are to be issued upon such conversion shall be deemed
                  to have become the holder or holders of record of the shares
                  of Class A Common represented thereby.

                           (iii) New Certificates. Pursuant to either a
                  Mandatory Conversion or an Elective Conversion, the
                  Corporation shall issue and deliver each of the following upon
                  surrender of the certificates of Class B Common for conversion
                  and the receipt of the required written notice:

                                    (A) The certificate or certificates
                           representing the shares of Class A Common issuable
                           upon such conversion; and

                                    (B) a certificate representing any shares of
                           Class B Common which were represented by the
                           certificate or certificates delivered to the
                           Corporation in connection with such conversion but
                           which were not converted into shares of Class A
                           Common.

                           The issuance of certificates representing shares of
                  Class A Common received upon conversion of shares of Class B
                  Common shall be made without charge to the holders of such
                  shares for any issuance tax in respect thereof or other cost
                  incurred by the Corporation in connection with such conversion
                  and the related issuance of Class A Common.

                           (iv) The Corporation will not close its books against
                  the transfer of shares of Class A Common in any manner which
                  would interfere with the timely conversion of any shares of
                  Class B Common.

                           (v) The Corporation shall at all times reserve from
                  its authorized Class A Common a sufficient number of shares to
                  provide for conversion of all Class B Common from time to time
                  outstanding.

                           (vi) Following its conversion to Class A Common, a
                  share of Class B Common may not be reissued by the
                  Corporation.

                           (vii) The Corporation shall note on the certificates
                  for shares of Class B Common that there are restrictions on
                  transfer imposed by Article IV, Section (e) hereof.


                                       4

<PAGE>



                  (f) As used herein, "Permitted Transferee" means any of the
following:

                           (i) In the case of any Initial Holder who is a
                  natural person or any Permitted Transferee who is a natural
                  person:

                                    (A) Any spouse or lineal descendant of such
                           stockholder (the stockholder and such spouse and
                           lineal descendants are herein collectively referred
                           to as "Class B Holder's Family Members");

                                    (B) The trustee of a trust (including a
                           voting trust) principally for the benefit of such
                           stockholder and/or one or more of his, her or its
                           Permitted Transferees, provided that such trust may
                           also grant a general or special power of appointment
                           to one or more of such Class B Holder's Family
                           Members and may permit trust assets to be used to pay
                           taxes, legacies and other obligations of the trust or
                           of the estates of one or more of such Class B
                           Holder's Family Members payable by reason of the
                           death of any of such Class B Holder's Family Members;

                                    (C) A corporation if a majority of all of
                           the outstanding capital stock of such corporation
                           which is entitled to vote for the election of
                           directors is owned by the holder of the Class B
                           Common in question or his, her or its Permitted
                           Transferees, provided that if by reason of any change
                           in the ownership of such stock, such corporation
                           would no longer qualify as a Permitted Transferee,
                           all shares of Class B Common then held by such
                           corporation shall, at the moment of such change, be
                           subject to a Mandatory Conversion;

                                    (D) A partnership if a majority of the
                           interests in the partnership are owned by the holder
                           of the Class B Common in question or his, her or its
                           Permitted Transferees determined under this clause
                           (f)(i), provided that if by reason of any change in
                           the ownership of such partnership interests, such
                           partnership would no longer qualify as a Permitted
                           Transferee, all shares of Class B Common then held by
                           such partnership shall, at the moment of such change,
                           be subject to a Mandatory Conversion;

                                    (E) A limited liability company if a
                           majority of all of the member interests in the
                           company are owned by the holder of the Class B Common
                           in question or his, her or its Permitted Transferees
                           determined under this clause (f)(i), provided that if
                           by reason of any change in the ownership of such
                           member interests, such company would no longer
                           qualify as a Permitted Transferee, all shares of
                           Class B Common then held by such company shall, at
                           the moment of such change, be subject to a Mandatory
                           Conversion; and



                                       5

<PAGE>



                                    (F) The estate of such stockholder.

                           (ii) In the case of a holder of shares of Class B
                  Common holding such shares as trustee pursuant to a trust,
                  Permitted Transferee means (A) any person transferring shares
                  of Class B Common to such trust and (B) any Permitted
                  Transferee of any such person determined pursuant to clause
                  (f)(i) above.

                           (iii) In the case of a holder of Class B Common which
                  is a limited partnership that acquired record and beneficial
                  ownership of the shares of Class B Common in question upon its
                  initial issuance by the Corporation, Permitted Transferee
                  means (A) any limited or general partner of such partnership
                  as of the date of the initial issuance of the shares of Class
                  B Common, and (B) any Permitted Transferee of any such person
                  determined under clause (f)(i) above.

                           (iv) In the case of a holder of Class B Common which
                  is a corporation, partnership or limited liability company
                  (other than a limited partnership described in clause (f)(iii)
                  above) holding record and beneficial ownership of the shares
                  of Class B Common in question, Permitted Transferee means (A)
                  any person transferring such shares of Class B Common to such
                  corporation, partnership or company and (B) any Permitted
                  Transferee of any such person determined under clause (f)(i)
                  above.

                           (v) In the case of a holder of Class B Common which
                  is the estate of a deceased stockholder, or which is the
                  estate of a bankrupt or insolvent stockholder, which holds
                  record and beneficial ownership of the shares of Class B
                  Common in question, Permitted Transferee means a Permitted
                  Transferee of such deceased, bankrupt or insolvent stockholder
                  as determined pursuant to clause (f)(i), (f)(ii), (f)(iii) or
                  (f)(iv) above, as the case may be.

                  (g) For purposes of Article IV.2(f) above:

                           (i) The relationship of any person that is derived by
                  or through legal adoption shall be considered a natural one.

                           (ii) Each joint owner of a share of Class B Common
                  shall be considered a stockholder.

                           (iii) Unless otherwise specified, the term "person"
                  means both natural persons and legal entities.

                  (h) Without derogating from the effect of a change in
         ownership described in Article IV.2(f) above, each reference to a
         corporation shall include any successor corporation or other entity
         resulting from a merger, consolidation or other corporate


                                       6

<PAGE>


         reorganization or similar event, each reference to a partnership shall
         include any successor partnership or other entity resulting from the
         death or withdrawal of a partner or a merger, consolidation or similar
         event, and each reference to a limited liability company shall include
         any successor limited liability company or other entity resulting from
         the death or withdrawal of a member or a merger, consolidation or
         similar event.

                  (i) No restatement or amendment may be made to this Restated
         Certificate of Incorporation that adversely affects the specified
         rights of the holders of Class B Common (including, but not limited to,
         the conversion rights, voting rights, and rights with respect to the
         election of directors and classification of directors) or to authorize
         any additional shares of capital stock other than the capital stock
         authorized herein, without the affirmative vote of a majority of the
         holders of the Class B Common.

         3. Preferred Stock. The Board of Directors is authorized, subject to
limitations prescribed by law, to provide for the issuance of the shares of
Preferred Stock in classes, and by filing a certificate setting forth the
designations of such shares pursuant to the applicable law of the State of
Delaware, to establish from time to time the number of shares to be included in
each such class, and to fix the designations, powers, preferences and rights of
the shares of each such class and the qualifications, limitations or
restrictions thereof. The authority of the Board of Directors with respect to
each class shall include, but not be limited to, determination of the following:

                  (a) The number of shares constituting that class and the
         distinctive designation of that class;

                  (b) The dividend rate, if any, on the shares of that class,
         the dividend preference, if any, of that class, whether dividends shall
         be cumulative, and, if so, from which date or dates, and the relative
         rights of priority, if any, of payment of dividends on shares of that
         class;

                  (c) Whether that class shall have voting rights, in addition
         to the voting rights provided by law, and if so, the terms of such
         voting rights;

                  (d) Whether that class shall have conversion privileges, and,
         if so, the terms and conditions of such conversion, including provision
         for adjustment of the conversion rate in such events as the Board of
         Directors shall determine;

                  (e) Whether or not the shares of that class shall be
         redeemable, and, if so, the terms and conditions of such redemption,
         including the date or date upon or after which the class shall be
         redeemable, and the amount per share payable in case of redemption,
         which amount may vary under different conditions and at different
         redemption dates;

                  (f) Whether that class shall have a sinking fund for the
         redemption or purchase of shares of that class, and, if so, the terms
         and amount of such sinking fund;


                                       7

<PAGE>


                  (g) The rights of the shares of that class in the event of
         voluntary or involuntary liquidation, dissolution or winding up of the
         Corporation, and the relative rights of priority, if any, of payment of
         shares of that class; and

                  (h) Any other relative rights, preferences and limitations of
that class.

         If, upon any voluntary or involuntary liquidation, dissolution or
winding up of the Corporation, the assets available for the distribution to
holders of shares of Preferred Stock of all classes shall be insufficient to pay
such holders the full preferential amount to which they are entitled, then such
assets shall be distributed ratably among the shares of all classes of Preferred
Stock in accordance with the respective preferential amounts (including unpaid
cumulative dividends, if any) payable with respect thereto.

                                       V.

         The Board of Directors is expressly authorized and empowered to adopt,
amend, modify and repeal the By-Laws of the Corporation, subject to (a) the
limitations on such power set forth in Article VIII of the By-Laws and (b) the
power of the stockholders of the Corporation, subject to the limitation on such
power set forth in Article VIII of the By-Laws, to amend, modify or repeal any
By-Laws adopted by the Board of Directors.

                                       VI.

         1. The business of the Corporation shall be managed by a Board of
Directors, and, subject to the requirement that the number of directors
comprising the Board of Directors may not be less than three (3), the number of
directors comprising the Board of Directors shall be fixed by the By-Laws and
such number may from time to time be increased or decreased (but not below
three) in such manner as is provided by the By-Laws of the Corporation. The
number of directors comprising the Board of Directors on the date hereof shall
be four (4).

         2. The Board of Directors shall consist of two classes of directors:
(a) "Class B Directors" of which there shall be two (2) directors at all times
during which shares of Class B Common are issued and outstanding. The Class B
Directors shall be elected solely by majority vote of the holders of the Class B
Common voting as a separate class from all other shares of capital stock of the
Corporation, and (b) "Class A Directors", who shall be all directors of the
Corporation who are not Class B Directors. Class A Directors shall be elected by
holders of all shares of capital stock of the Corporation entitled to vote in
the election of directors (including, but not limited to, the Class A Common and
the Class B Common). Class B Directors may be removed at any time, and the
vacancy(ies) thereby created filled, by a majority vote of the holders of the
Class B Common voting as a separate class from all other shares of capital stock
of the Corporation. If at any time after the date hereof no shares of Class B
Common are issued and outstanding, this subsection VI.2 shall be void and of no
further force or effect.


                                       8

<PAGE>


                                      VII.

         Each person who is or was or had agreed to become a director or officer
of the Corporation, or each such person who is or was serving or had agreed to
serve at the request of the Board of Directors or an officer of the Corporation
as an employee or agent of the Corporation or as a director, officer, employee
or agent of another corporation, partnership, joint venture, trust or other
enterprise (including the heirs, executors, administrators or estate of such
person), shall be indemnified by the Corporation to the fullest extent permitted
by the General Corporation Law of the State of Delaware or any other applicable
laws as now or hereafter in effect. Without limiting the generality or effect of
the foregoing, the Corporation may enter into one or more agreements with any
person which provide for indemnification greater or different that that provided
in this Article VII. No amendment to or repeal of this Article VII shall apply
to or have any effect on the right to indemnity permitted or authorized
hereunder for or with respect to claims asserted before or after such amendment
or repeal arising from acts or omissions occurring in the whole or in part
before the effective date of such amendment or repeal.

                                      VIII.

         To the fullest extent permitted by the Delaware General Corporation Law
as the same exists or may hereafter be amended, a director of the Corporation
shall not be liable to the Corporation or its stockholders for monetary damages
for breach of fiduciary duty as a director. No amendment to or repeal of this
Article VIII shall apply to or have any effect on the liability or alleged
liability of any director of the Corporation for or with respect to any acts or
omissions of such director occurring prior to such amendment or repeal.

                                       IX.

         Subject to Article IV.2(i) hereof, the Corporation reserves the right
to amend, modify or repeal any provision contained in this Restated Certificate
of Incorporation, in the manner now or hereafter prescribed by statute or by
this Restated Certificate of Incorporation of the Corporation, and all rights
conferred upon stockholders herein are granted subject to this reservation.

         IN WITNESS WHEREOF, this Restated Certificate of Incorporation has been
signed by Tansukh V. Ganatra, its authorized officer this _______ day of
_____________, 1998.

                               US LEC CORP.


                               By:
                                    Tansukh V. Ganatra
                                    President and Chief Operating Officer


                                       9



                                 AMENDMENT NO. 1
                                       TO
                                   BY-LAWS OF
                                  US LEC CORP.


         RESOLVED, that Article VII of the Bylaws of the Corporation be, and it
hereby is, amended by adding the following Section 4:

                  Section 4. Advancement of Expenses. Expenses (including
         attorneys' fees) incurred by an officer or director in defending any
         civil, criminal, administrative or investigative action, suit or
         proceeding with respect to which such person may be entitled to
         indemnification shall be paid by the Corporation in advance of the
         final disposition of such action, suit or proceeding upon receipt of an
         undertaking by or on behalf of such director or officer to repay such
         amount if it shall ultimately be determined that such person is not
         entitled to be indemnified by the Corporation as authorized under
         Delaware General Corporation Law and under the Corporation's
         Certificate of Incorporation.

         FURTHER RESOLVED, that except as amended hereby, all provisions of the
Bylaws shall continue and remain in full force and effect.










Adopted as of February 1, 1998





                                                                 Exhibit 4

                               [US LEC Corp. Logo]
                                                                    CLASS A
                                                               COMMON STOCK

NUMBER                                                           SHARES

                                  US LEC CORP.

              INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                                          CUSIP 90331S 10 9
THIS CERTIFIES THAT:



IS THE REGISTERED HOLDER OF

          FULLY PAID AND NONASSESSABLE SHARES OF CLASS A COMMON STOCK,
                          PAR VALUE $0.01 PER SHARE, OF

                                  US LEC Corp.

(the "Corporation"), a Delaware corporation. The shares represented by this
certificate are transferable only on the stock transfer books of the Corporation
by the holder of record hereof, or by his duly authorized attorney or legal
representative, upon the surrender of this certificate properly endorsed. This
certificate is not valid until countersigned and registered by the Corporation's
transfer agent and registrar.

         IN WITNESS WHEREOF, the Corporation has caused this certificate to be
executed by the facsimile signatures of its duly authorized officers and has
caused a facsimile of its corporate seal to be hereunto affixed.

Dated

Countersigned and Registered:                  /s/ Richard T. Aab
                                                        Chairman and Chief
                                                        Executive Officer


First Union National Bank
(Charlotte, North Carolina) Transfer Agent and           /s/ Tansukh V. Ganatra
Registrar                                                   Assistant Secretary
By
Authorized Officer

                              SEAL OF US LEC CORP.

<PAGE>

                                  US LEC CORP.


     The shares represented by this certificate are issued subject to all the
provisions of the certificate of incorporation and bylaws of US LEC Corp. (the
"Corporation") as from time to time amended (copies of which are on file at the
principal executive offices of the Corporation).

     The Corporation will furnish to any stockholder upon request and without
charge a full statement of the powers, designations, preferences and relative
participating, optional or other special rights of each authorized class of
stock or series thereof and the qualifications, limitations or restrictions of
such preferences and/or rights, to the extent that the same have been fixed, and
of the authority of the board of directors to designate the same with respect to
other series. Such request may be made to the Corporation or to its transfer
agent and registrar.

     The following abbreviations, when used on the face of this certificate,
shall be construed as though they were written out in full according to
applicable laws or regulations:
<TABLE>
<CAPTION>

<S>                                                            <C>
   TEN COM   --   as tenants in common                         UNIF GIFT MIN ACT--  ............Custodian..........
   TEN ENT   --   as tenants joined by the entireties                                  (Cust)              (Minor)
   JT TEN    --   as joint tenants with right of                                    Under Uniform Gifts to Minors
                  survivorship and not as                                           Act ...........................
                  tenants in common                                                               (State)
                                                              UNIF TRANS MIN ACT --  ............Custodian..........
                                                                                         (Cust)              (Minor)
                                                                                    Under   Uniform   Transfers   to
                                                                                    Minors Act .....................
                                                                                                  (State)

</TABLE>


                      Additional abbreviations may also be used though not in
the above list.

For value received,                      hereby sell, assign and transfer unto
                   ----------------------

           PLEASE INSERT SOCIAL SECURITY OR OTHER
               IDENTIFYING NUMBER OF ASSIGNEE
       ------------------------------------------------


       ------------------------------------------------



- -----------------------------------------------------------------------------
        (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE)


- -----------------------------------------------------------------------------


- -----------------------------------------------------------------------------


                                                                        Shares
- -------------------------------------------------------------------------



of the Common Stock represented by the within certificate, do and hereby
irrevocably constitute and appoint

                                                                   Attorney
- --------------------------------------------------------------------

                                       2
<PAGE>


to transfer the said shares on the books of the within named Corporation with
full power of substitution in the premises.


Dated
      ---------------------------

                           NOTICE:
                                  --------------------------------------------
                                    THE SIGNATURE TO THIS ASSIGNMENT MUST
                                    CORRESPOND WITH THE NAME AS WRITTEN UPON THE
                                    FACE OF THE CERTIFICATE IN EVERY PARTICULAR,
                                    WITHOUT ALTERATION OR ENLARGEMENT OR ANY
                                    CHANGE WHATEVER.

     SIGNATURE(S) GUARANTEED:
                             ------------------------------------------------
                                    THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN
                                    ELIGIBLE GUARANTOR INSTITUTION (BANKS,
                                    STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS
                                    AND CREDIT UNIONS WITH MEMBERSHIP IN AN
                                    APPROVED SIGNATURE GUARANTEE MEDALLION
                                    PROGRAM), PURSUANT TO S.E.C. RULE 17ad-15.

                                       3




                             MOORE & VAN ALLEN, PLLC
                          NATIONSBANK CORPORATE CENTER
                        100 NORTH TRYON STREET, FLOOR 47
                      CHARLOTTE, NORTH CAROLINA 28202-4003


                                 April __, 1998

US LEC Corp.
212 South Tryon Street, Suite 1540
Charlotte, North Carolina 28281

         Re:      Registration Statement on Form S-1

Ladies and Gentlemen:

         We have acted as counsel to US LEC Corp., a Delaware corporation (the
"Company"), in connection with the registration by the Company under the
Securities Act of 1933, as amended, on Form S-1 of 5,500,000 shares (the
"Initial Shares") of the Company's Class A Common Stock, par value $0.01 per
share (the "Common Stock"), and up to 825,000 shares (the "Option Shares") of
Common Stock upon the exercise of the over-allotment option granted to the
several underwriters named in the registration statement relating to the Shares
(as defined below) (the "Registration Statement"). The Initial Shares and the
Option Shares (to the extent the aforementioned option is exercised) are herein
collectively referred to as the "Shares." The Shares will be sold pursuant to an
Underwriting Agreement by and among the Company, Smith Barney Inc., Bear Stearns
& Co., Inc. and Wheat First Securities, Inc. as representatives of the several
underwriters named in the Registration Statement (the "Underwriting Agreement").

         We have reviewed such documents and considered such matters of law and
fact as we, in our professional judgment, have deemed appropriate to render the
opinions contained herein. Where we have considered it appropriate, as to
certain facts we have relied, without investigation or analysis of any
underlying data contained therein, upon certificates or other comparable
documents of public officials and officers or other appropriate representatives
of the Company.

         Based upon such examination, and relying upon statements of fact
contained in the documents which we have examined, we are of the opinion that
the Shares to be sold pursuant to the Underwriting Agreement have been duly
authorized and will be validly issued, fully paid and nonassessable when issued,
delivered and paid for as contemplated by the Underwriting Agreement.

         We hereby consent to the filing of this opinion as Exhibit 5 to the
Registration Statement and to the reference to this firm under the caption
"Legal Matters" in the Prospectus included therein.

                                            Very truly yours,

                                            MOORE & VAN ALLEN, PLLC


   
                                  US LEC CORP.

                                 PROMISSORY NOTE

January 16, 1998                                                  $2,289,150
    
     US LEC Corp., a Delaware  corporation (the  "Company"),  hereby promises to
pay to the order of Melrich Associates, L.P. the principal amount of Two Million
Two Hundred Eighty-Nine Thousand One Hundred Fifty Dollars ($2,289,150) together
with interest  thereon  calculated  from the date hereof in accordance  with the
provisions of this Note.

     1.   Payment  of  Interest.  Interest  shall  accrue  at the rate of twelve
          percent  (12%) per annum on the unpaid  principal  amount of this Note
          outstanding  from time to time,  or (if less) at the highest rate then
          permitted under applicable law. The Company shall pay to the holder of
          this Note all accrued  interest  on the last day of each March,  June,
          September and December,  beginning March 30, 1998.  Unless  prohibited
          under  applicable  law, any accrued  interest which is not paid on the
          date on which it is due and  payable  shall bear  interest at the same
          rate at which  interest is then  accruing on the  principal  amount of
          this Note until such interest is paid. Any accrued  interest which for
          any reason has not theretofore  been paid shall be paid in full on the
          date on  which  the  final  principal  payment  on this  Note is made.
          Interest  shall  accrue on any  principal  payment due under this Note
          and, to the extent  permitted by applicable law, on any interest which
          has not been  paid on the date on  which it is due and  payable  until
          such time as payment  therefor is actually  delivered to the holder of
          this Note.

     2.   Payment of Principal on Note.

          (a)  Prepayments.  The Company  may, at any time and from time to time
               without  premium or  penalty,  prepay  all or any  portion of the
               outstanding  principal amount of the Notes, provided that (i) the
               Company has paid all  interest on the Notes  accrued  through the
               immediately  preceding  scheduled  interest payment date and (ii)
               the minimum  principal  amount so prepaid  shall be the lesser of
               $100,000 or the amount of principal  outstanding on the Notes. In
               connection  with each  prepayment  of  principal  hereunder,  the
               Company  shall also pay all  accrued  and unpaid  interest on the
               principal amount of the Notes being repaid.
   
          (b)  Principal   Repayment.   On  January 16,  2003  (the  "Scheduled
               Repayment Date"), the Company shall pay all outstanding principal
               and interest on the Notes.

    
<PAGE>


          (c)  Special Principal Repayments.

              (i)   If a Change in Control has  occurred or the Company  obtains
                    knowledge that a Change in Control is proposed to occur, the
                    Company shall give prompt  written  notice of such Change in
                    Control  describing in reasonable  detail the material terms
                    and date of consummation thereof to the holder of this Note,
                    but in any event such  notice  shall not be given later than
                    five days after the  occurrence  of such  Change in Control,
                    and the  Company  shall give the holder of this Note  prompt
                    written notice of any material change in the terms or timing
                    of such transaction. The holder of this Note may require the
                    Company to pay all or any  portion of the  principal  amount
                    remaining on this Note plus all unpaid accrued interest with
                    respect to such principal amount.

              (ii)  The Company  shall be  obligated to pay the amount set forth
                    in  subparagraph  (i) above  with  respect  to the Change in
                    Control.  If any proposed  Change in Control does not occur,
                    all requests for payment in  connection  therewith  shall be
                    automatically  rescinded,  or if there  has been a  material
                    change in the terms or the  timing of the  transaction,  the
                    holder of the Note may  rescind  its  request for payment by
                    giving written notice of such rescission to the Company.

              (iii) The term  "Change in Control"  means (a) any sale,  transfer
                    or issuance or series of sales,  transfers  and/or issuances
                    of Common Stock by the Company or any holders  thereof which
                    results  in any  Person  or  group of  Persons  (as the term
                    "group" is used under the  Securities  Exchange Act of 1934,
                    as amended),  owning  shares of Common Stock  entitling  the
                    owners thereof to more than 40% of the combined voting power
                    of all shares of Common Stock outstanding  immediately after
                    such  sale,   transfer  or  issuance  or  series  of  sales,
                    transfers  and/or issuances or (b) any change of 50% or more
                    of the members of the  Company's  Board of Directors  during
                    any 12 month  period if the  election  of the new members is
                    not  approved  or  recommended  by the  Company's  Board  of
                    Directors in office prior to such change.

              (iv)  If a  Fundamental  Change is proposed to occur,  the Company
                    shall  give  written  notice  of  such  Fundamental   Change
                    describing in reasonable  detail the material terms and date
                    of consummation  thereof to the holder of this Note not more
                    than 45 days nor less than 20 days prior to the consummation
                    of such Fundamental  Change,  and the Company shall give the
                    holder of this Note prompt  written  notice of any  material
                    change in the terms or timing


                                       2
<PAGE>


                    of such transaction. The holder of this Note may require the
                    Company to pay all or any  portion of the  principal  amount
                    remaining on this Note plus all unpaid accrued interest with
                    respect to such principal amount.

              (v)   The Company  shall be  obligated to pay the amount set forth
                    in  subparagraph  (iv) above upon the  consummation  of such
                    Fundamental Change. If any proposed  Fundamental Change does
                    not occur, all requests for payment in connection  therewith
                    shall be  automatically  rescinded,  or if there  has been a
                    material   change  in  the  terms  or  the   timing  of  the
                    transaction, the holder of this Note may rescind its request
                    for  payment by  delivering  written  notice  thereof to the
                    Company prior to the consummation of the transaction.

              (vi)  The term "Fundamental Change" means (a) any sale or transfer
                    of  more  than  50% of the  assets  of the  Company  and its
                    Subsidiaries  on a consolidated  basis  (measured  either by
                    book value in accordance with generally accepted  accounting
                    principles  consistently  applied  or by fair  market  value
                    determined  in the  reasonable  good faith  judgment  of the
                    Company's  board of directors) in any  transaction or series
                    of transactions  (other than sales in the ordinary course of
                    business) and (b) any merger or  consolidation  to which the
                    Company is a party, except for a merger in which the Company
                    is the  surviving  corporation,  and after giving  effect to
                    such  merger,  no  Person or group of  Persons  (as the term
                    "group"  is  used  under  the  Securities  Act of  1934,  as
                    amended) owns more than 40% of the combined  voting power of
                    all shares of Common  Stock  outstanding  immediately  after
                    such merger who did not own 40% or more of such voting power
                    of the Company prior to such merger.

     3.   Events of Default.

          (a)  Definition.  For purposes of this Note, an Event of Default shall
               be  deemed  to have  occurred  if any of the  following  exist or
               occur:

              (i)   the Company  fails to pay when due and  payable  (whether at
                    maturity or  otherwise)  the full  amount of  interest  then
                    accrued on any Note or the full amount of any  principal due
                    on any Note,  and such  failure  to pay is not cured  within
                    five days after the occurrence thereof; or

              (ii)  the Company  fails to perform or observe any other  material
                    covenant or  agreement  in this Note and such failure is not
                    cured


                                       3
<PAGE>


                    within  30 days  after the  earlier  of (A) the  receipt  of
                    notice  thereof  by the  holder  of  this  Note  or (B)  the
                    discovery thereof by the Company;

              (iii) US LEC of  Georgia  L.L.C.  and  US  LEC of  North  Carolina
                    L.L.C.  fail  to  perform  or  observe  any  other  material
                    covenant  or  agreement   in  that   Certain   Guaranty  and
                    Suretyship  Agreement  dated  as of  the  date  hereof  (the
                    "Payment  Default")  and such failure is not cured within 30
                    days after the earlier of (A) the receipt of notice  thereof
                    by the holder of this Note or (B) the  discovery  thereof by
                    the Company;

              (iv)  any representation,  warranty or information  required to be
                    furnished  to the  holder  is  misleading  in  any  material
                    respect  on the date  made or  furnished  and such  false or
                    misleading  representation,  warranty or information relates
                    to  a  material  adverse  effect  on  the  Company  and  its
                    Subsidiaries,  taken as a whole,  or  fails  to  disclose  a
                    material adverse change on the Company and its Subsidiaries,
                    taken as a whole;

              (v)   the Company or any  Subsidiary  makes an assignment  for the
                    benefit of creditors  or admits in writing its  inability to
                    pay its debts  generally  as they  become  due; or an order,
                    judgment  or decree is entered  adjudicating  the Company or
                    any  Subsidiary  bankrupt  or  insolvent;  or any  order for
                    relief  with  respect to the  Company or any  Subsidiary  is
                    entered under the Federal Bankruptcy Code; or the Company or
                    any Subsidiary  petitions or applies to any tribunal for the
                    appointment of a custodian,  trustee, receiver or liquidator
                    of the Company or any Subsidiary, or of any substantial part
                    of the assets of the Company or any Subsidiary, or commences
                    any  proceeding  (other than a proceeding  for the voluntary
                    liquidation and  dissolution of any Subsidiary)  relating to
                    the  Company  or  any   Subsidiary   under  any   bankruptcy
                    reorganization,  arrangement,  insolvency,  readjustment  of
                    debt,  dissolution  or  liquidation  under  the  law  of any
                    jurisdiction;  or any such petition or application is filed,
                    or any such proceeding is commenced,  against the Company or
                    any  Subsidiary  and  either  (A) the  Company  or any  such
                    Subsidiary  by  any  act  indicates  its  approval  thereof,
                    consent  thereto  or   acquiescence   therein  or  (B)  such
                    petition,  application or proceeding is not dismissed within
                    60 days;

              (vi)  a judgment in excess of  $500,000  is  rendered  against the
                    Company or any  Subsidiary  and,  within 60 days after entry
                    thereof,   such  judgment  is  not  discharged  in  full  or
                    execution thereof stayed


                                       4
<PAGE>


                    pending  appeal,  or within 60 days after the  expiration of
                    any such stay, such judgment is not discharged in full; or

              (vii) the Company or any  Subsidiary  defaults in the  performance
                    of any  obligation if the effect of such default is to cause
                    an amount  exceeding  $500,000  to  become  due prior to its
                    stated  maturity  or to permit the holder or holders of such
                    obligation to cause an amount  exceeding  $500,000 to become
                    due prior to its stated maturity.

                    The foregoing shall  constitute  Events of Default  whatever
                    the  reason  or cause  for any such  Event  of  Default  and
                    whether it is  voluntary  or  involuntary  or is effected by
                    operation  of law or  pursuant  to any  judgment,  decree or
                    order of any court or any order,  rule or  regulation of any
                    administrative or governmental body.

          (b)  Consequences of Events of Default.

              (i)   If  any  Event  of   Default  of  the  type   described   in
                    subparagraph 5(a)(i), 5(a)(ii) or 5(a)(iii) has occurred and
                    is continuing, the interest rate on this Note shall increase
                    immediately  to  15%  or  (if  less)  to  the  highest  rate
                    permitted  by law  and any  increase  of the  interest  rate
                    resulting  from the  operation  of this  subparagraph  shall
                    terminate  as of the close of  business on the date on which
                    no Event of Default of the type  described  in  subparagraph
                    5(a)(i) or 5(a)(ii) exists (subject to subsequent  increases
                    pursuant to this subparagraph).

              (ii)  If an Event of Default of the type described in subparagraph
                    5(a)(iv) has  occurred,  the aggregate  principal  amount of
                    this Note  (together with all accrued  interest  thereon and
                    all other  amounts due and  payable  with  respect  thereto)
                    shall become  immediately due and payable without any action
                    on the part of the  holder  of this  Note,  and the  Company
                    shall immediately pay to the holder of this Note all amounts
                    due and payable with respect to this Note.

              (iii) If any Event of Default has occurred and is continuing,  the
                    holder of this Note may  declare  all or any  portion of the
                    outstanding principal amount of this Note (together with all
                    accrued  interest  thereon  and all  other  amounts  due and
                    payable  with  respect  thereto) to be  immediately  due and
                    payable  and  may  demand  immediate  payment  of all or any
                    portion  of the  outstanding  principal  amount of this Note
                    (together with all such other amounts then due and payable).


                                       5
<PAGE>


              (iv)  The  holder of this Note  shall  also have any other  rights
                    which  he may have  been  afforded  under  any  contract  or
                    agreement at any time and any other rights which he may have
                    pursuant to applicable law.

              (v)   The Company hereby waives  diligence,  presentment,  protest
                    and demand and notice of protest  and demand,  dishonor  and
                    nonpayment of this Note and expressly agrees that this Note,
                    or any payment hereunder,  may be extended from time to time
                    and that the holder hereof may accept security for this Note
                    or release  security  for this Note,  all without in any way
                    affecting the liability of the Company hereunder.

     4.   Amendment and Waiver.  Except as otherwise  expressly provided herein,
          the  provisions  of this Note may be amended  and the Company may take
          any  action  herein  prohibited,  or omit to  perform  any act  herein
          required to be  performed  by it, only if the Company has obtained the
          written consent of the holder of this Note.

     5.   Definitions.  For  purposes of this Note,  the  following  capitalized
          terms have the following meaning:

          "Common  Stock" means the Company's  Common Stock,  par value $.01 per
          share, including all classes and series of such Common Stock.

          "Convertible  Securities"  means any stock or  securities  (other than
          options)  directly or indirectly  convertible into or exchangeable for
          Common Stock.

          "Person" means an individual, a partnership,  a corporation, a limited
          liability company,  an association,  a joint stock company, a trust, a
          joint  venture,  an  unincorporated  organization  and a  governmental
          entity or any department, agency or political subdivision thereof.

          "Subsidiary"  means,  with respect to any Person,  any Person of which
          (i) if a corporation or a limited  liability company which is taxed as
          a  corporation  for federal  purposes,  a majority of the total voting
          power of  shares  of stock or units of  membership  entitled  (without
          regard to the occurrence of any  contingency)  to vote in the election
          of  directors,  managers or  trustees  thereof is at the time owned or
          controlled, directly or indirectly, by the first Person or one or more
          of the  other  Subsidiaries  of that  first  Person  or a  combination
          thereof,  or (ii) if a limited  liability company (which is taxed as a
          partnership  for federal tax  purposes),  partnership,  association or
          other business  entity, a majority of the partnership or other similar
          ownership  interest  thereof  is at  the  time  owned  or  controlled,
          directly  or  indirectly,   by  such  first  Person  or  one  or  more
          Subsidiaries  of that  first  Person  or a  combination  thereof.  For
          purposes  hereof,  a  Person  or  Persons  shall be  deemed  to have a
          majority ownership interest in a limited liability company


                                       6
<PAGE>


          (which  is  taxed  as  a  partnership   for  federal  tax   purposes),
          partnership,  association or other  business  entity if such Person or
          Persons  shall be allocated a majority of limited  liability  company,
          partnership,  association or other business  entity gains or losses or
          shall be or control any managing  director or general  partner of such
          limited liability company, partnership,  association or other business
          entity.

     6.   Cancellation.  After all  principal  and accrued  interest at any time
          owed on this Note has been paid in full,  this Note shall  surrendered
          to the Company for cancellation and shall not be reissued.

     7.   Payments.  Unless otherwise expressly provided herein, all payments to
          be made to the holders of this Note shall be made in the lawful  money
          of the United States of America in immediately available funds.

     8.   Place  of  Payment.  Payments  of  principal  and  interest  shall  be
          delivered to Melrich Associates, L.P. at the following address:

               Melrich Associates, L.P.
   
               29 Woodstone Rise
               -------------------------
               Pittsford, N.Y. 14534
               -------------------------
    


          or to such other  address or to the  attention of such other person as
          specified by prior written notice to the Company.

     9.   Business  Days.  If any  payment is due, or any time period for giving
          notice or taking action expires, on a day which is a Saturday,  Sunday
          or  legal  holiday  in the  State  of New  York or the  State of North
          Carolina, the payment shall be due and payable on, and the time period
          shall  automatically be extended to, the next business day immediately
          following such Saturday,  Sunday or legal holiday,  and interest shall
          continue  to  accrue at the  required  rate  hereunder  until any such
          payment is made.

     10.  Usury Laws.  It is the intention of the Company and the holder of this
          Note to conform strictly to all applicable usury laws now or hereafter
          in force, and any interest payable under this Note shall be subject to
          reduction  to the amount  not in excess of the  maximum  legal  amount
          allowed under the applicable usury laws as now or hereafter  construed
          by the courts having  jurisdiction over such matters.  If the maturity
          of this Note is  accelerated  by reason of an  election  by the holder
          hereof resulting from an Event of Default, voluntary prepayment by the
          Company or otherwise, then earned interest may never include more that
          the maximum  amount  permitted by law shall be canceled  automatically
          and, if  theretofore  paid,  shall at the option of the holder  hereof
          either be rebated to the Company or credited on the  principal  amount
          of this Note, or if this Note has been paid,  then the excess shall be
          rebated to the Company. The aggregate of all interest (whether


                                       7
<PAGE>


          designated  as  interest,   service  charges,   points  or  otherwise)
          contracted for,  chargeable or receivable  under this Note shall under
          no  circumstances  exceed  the  maximum  legal  rate  upon the  unpaid
          principal  balance of this Note remaining unpaid from time to time. If
          such interest does exceed the maximum legal rate, it shall be deemed a
          mistake  and such  excess  shall be  canceled  automatically  and,  if
          theretofore paid,  rebated to the Company or credited on the principal
          amount of this Note, or if this Note has been repaid, then such excess
          shall be rebated to the Company.

     11.  Notices.  All  notices,  requests and other  communications  hereunder
          shall be in  writing  and will be deemed  to have been duly  given (a)
          when personally delivered,  (b) when sent by telefax to a party at the
          number   listed   below  for  such  party   provided  the  sender  has
          machine-produced  evidence  of  successful  transmission,  (c) two (2)
          Business  Days  after  the day on which  the  same has been  delivered
          prepaid to a national  overnight courier service providing evidence of
          delivery  or (d) three (3)  Business  Days  after the day on which the
          same was deposited in the United States mail, registered or certified,
          return receipt requested,  postage prepaid,  in each case addressed to
          the party to whom such notice is to be given at the following  address
          for such party:
   
               US LEC Corp.
               212 South Tryon Street, Suite 1540
               Charlotte, North Carolina 28281
               Telefax: (704) 319-1345
               Attn: Chief Financial Officer

               Melrich Associates, L.P.
               29 Woodstone Rise
               Pittsford, New York 14534
               Telefax:(716) 387-0187
    
     IN WITNESS WHEREOF, the Company has executed and delivered this Note on the
date set forth above.


US LEC Corp., a Delaware corporation
   

By: /s/ David N. Vail
    -----------------------------------------
     David N. Vail, Executive Vice President
     Finance and Chief Financial Officer
    

                                       8
<PAGE>


ATTEST:                            [SEAL]


By:  /s/ Richard T. Aab
    -------------------------------------
     Richard T. Aab, Secretary


                                       9

   
                               SECURITY AGREEMENT

     THIS SECURITY AGREEMENT, dated as of the 16th day of January, 1998 (the
"Security Agreement"), is made by and between US LEC OF GEORGIA L.L.C., a
Delaware limited liability company and US LEC OF NORTH CAROLINA, L.L.C., a North
Carolina limited liability company (the "Debtors"), and MELRICH ASSOCIATES,
L.P., a New York limited partnership ("Melrich" or "Secured Party").

     The Company has borrowed an aggregate of $2,289,150 from Secured Party,
evidenced by promissory note dated January 16, 1998 (the "Note").
    
     Accordingly, in consideration of the premises and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged,
Debtors and the Secured Party hereby agrees as follows:

                                    ARTICLE I
                                   Definitions

     1.01 The term "Accounts Receivable" means all present and/or future
accounts, accounts receivable, receivables, contracts, contract rights, book
debts, checks, notes, drafts, instruments, chattel paper, documents,
acceptances, choses in action, any and all amounts due to Debtors from a factor
or other purchaser of accounts receivable of Debtors, and other forms of
obligations and receivables, together with all proceeds thereof, all monies due
and to become due thereon and all returned or repossessed goods, now or
hereafter owned or held by or payable to Debtors.

     1.02 The term "Debtors' Liabilities" wherever used in this Security
Agreement shall mean the indebtedness owing, due or payable from Debtors to the
Secured Party under the Notes.

     1.03 The term "Machinery, Equipment, and Fixtures" means all machinery,
equipment, furniture, rolling stock, vehicles and fixtures owned by Debtors of
every kind and description including, without limitation, switching equipment,
fixtures, accessories, office equipment, office furnishing, together with all
other machinery, equipment, and fixtures wherever located, now owned by the
Debtors, or whenever from time to time hereafter acquired by Debtors.

     1.04 All of the other terms in this Security Agreement shall have the
meanings provided by the Uniform Commercial Code of North Carolina to the extent
the same are used or defined therein.

                                   ARTICLE II
                          Creation of Security Interest

     2.01 To secure the repayment to Secured Party of Debtors' Liabilities,
Debtors hereby grant to Secured Party a security interest in Debtors' presently
owned or hereafter acquired Accounts Receivable, Machinery, Equipment, and
Fixtures (including but not limited to telecommunications switches manufactured
by Lucent Technologies, Inc.), and all proceeds, including without limitation,
insurance proceeds, of the foregoing collateral. The property and interest in
property described in this paragraph 2.01 are sometimes hereinafter collectively
referred to as the "Collateral."


                                  Page 1 of 5
<PAGE>


     2.02 Debtors shall execute and deliver to Secured Party concurrently with
the execution of this Security Agreement, and at any time or times hereafter at
the request of the Secured Party, all assignments, certificates of title,
conveyances, assignment statements, financing statements, renewal financing
statements, security agreements, affidavits, notices and all other agreements,
instruments and documents that the Secured Party may reasonably request, in form
satisfactory to the Secured Party and agrees to take any and all other steps
reasonably requested by the Secured Party, in order to perfect and maintain the
security interests and liens granted herein by Debtors to Secured Party. A
carbon, photographic or other reproduction of this Security Agreement or a
financing statement is sufficient and may be used as a financing statement under
this Security Agreement.

     2.03 Debtors do hereby irrevocably make, constitute and appoint Melrich as
the true and lawful attorney of Debtors with power to sign the name of Debtors
on any financing statement, renewal financing statement, notice or any similar
document which, in Melrich's reasonable opinion, must be filed in order to
perfect or continue the perfection of the security interests granted in this
Security Agreement. This power, being coupled with an interest, is irrevocable
so long as any of the Debtors' Liabilities remain unpaid.


                                   ARTICLE III
                         Priority of Security Interests

     3.01 Debtors warrant and represent that (a) the security interest granted
to Secured Party hereunder, when properly perfected by filing, shall constitute
at all times a valid and perfected security interest in the Collateral, vested
in Secured Party in and upon all of the Collateral and (b) if such security
interests are perfected on a timely basis, said security interests in said
Collateral shall not become subordinate or junior to the security interests,
liens or claims of any other person, firm or corporation, including the United
States or any department, agency or instrumentality thereof, or any state,
county or local governmental agency. Debtors shall not grant (without the prior
written approval of Secured Party) a security interest in or permit a lien or
encumbrance upon any of the Collateral to anyone as long as any of Debtors'
Liabilities remain unpaid (other than purchase money security interests or liens
and encumbrances related to seller financing and other than the security
interests granted in the Security Agreements and UCC-1 financing statements
dated the date hereof between Debtors, on the one hand, and Richard T. Aab and
Tansukh V. Ganatra, on the other hand).


                                  Page 2 of 5
<PAGE>


     3.02 Debtors represent and warrant that it is now and at all times
hereafter shall be the sole owner of its Machinery, Equipment, and Fixtures,
free and clear of all liens, encumbrances and security interests, except the
security interests and rights of Secured Party herein and purchase money
security interests or liens and encumbrances related to seller financing. Except
for all unused or obsolete Machinery, Equipment, and Fixtures, Debtors will keep
the Machinery, Equipment, and Fixtures in good repair and maintained in a
reasonable state of proper operating efficiency, and will make all necessary
repairs to and replacements of Machinery, Equipment, and Fixtures so that the
proper operating efficiency thereof shall at all times be maintained consistent
with prudent business practices. Debtors may only sell or otherwise dispose of
Machinery, Equipment and Fixtures (a) in the ordinary course of business or (b)
when the aggregate book value of the Machinery, Equipment and Fixtures to be
sold by Debtors in any one sale (or series of related sales or disposals
occurring during any three (3) calendar month period) does not exceed $50,000.

     3.03 Debtors represent and warrant that it is now and at all times
hereafter shall be the absolute owner, free and clear of all liens, encumbrances
and security interests of indefeasible title to its Accounts Receivable (except
the security interest and rights of Secured Party granted herein, purchase money
security interests and liens and encumbrances related to seller financing and
except as consent may be granted by Secured Party).

                                   ARTICLE IV
                                    Insurance

     The Debtors shall maintain insurance on all of the Machinery, Equipment and
Fixtures in accordance with the requirements of Exhibit A hereto, at its
expense. Certified copies of all such insurance policies shall be delivered to
the Secured Party promptly upon request. If requested by the Secured Party, such
notice shall name the Secured Party as loss payee and require thirty (30) days
notice to Secured Party prior to their termination or expiration. If the Debtors
shall at any time or times hereafter fail to obtain and maintain any of the
policies of insurance required above, or fail to pay any premium in whole or in
part relating to any such policies, then the Secured Party may, but he shall
have no obligation to do so, obtain and cause to be maintained any or all of
such policies, and pay any part or all of the premiums due thereunder, without
thereby waiving any default by the Debtors and any sum so disbursed by the
Secured Party shall become a part of the Debtors' Liabilities secured by the
Collateral, payable on demand.

                                    ARTICLE V
                                     Default

     5.01 Any one of the following events will constitute an Event of Default
hereunder:

          (a) An acceleration of the Note pursuant to its terms; and

          (b) failure by the Debtors to comply with the terms and conditions of
     this Security Agreement.

     5.02 Upon the occurrence of an Event of Default hereunder and at any time
thereafter the Secured Party (a) may, at his election, declare all of the
Debtors' Liabilities immediately due and payable; and (b) shall have all rights
and remedies of a secured party under the Uniform


                                  Page 3 of 5
<PAGE>


Commercial Code in addition to all other rights and remedies available at law or
in equity, all such rights and remedies being cumulative, not exclusive and
enforceable alternatively, successively or concurrently.

     5.03 If at any time or times hereafter the Secured Party employs counsel to
enforce any rights of the Secured Party or liabilities of the Debtors, account
debtors, or any person, firm or corporation which may be obligated to the
Secured Party by virtue of this Security Agreement, then in any of such events,
all of the reasonable attorneys' fees arising from such services, and any
expenses, costs and charges relating thereto, shall become a part of the
Debtors' Liabilities and shall be secured by the Collateral, payable on demand.

                                   ARTICLE VI
                                  Miscellaneous

     6.01 This Security Agreement shall be binding upon and inure to the benefit
of the successors and assigns of the parties hereto.

     6.02 The internal laws and decisions of the State of North Carolina shall
govern and control the construction, enforceability, validity and interpretation
of this Security Agreement.

     6.03 This Security Agreement contains the final, complete and exclusive
statement of the agreement between the parties with respect to the transactions
contemplated herein and all prior written agreements and all prior and
contemporaneous oral agreements with respect to the subject matter hereof are
merged herein. This Security Agreement may not be amended, supplemented or
modified (or any right or power granted hereunder waived) except by a written
instrument signed by the parties hereto (or in the case of a waiver, signed by
the party to be bound thereby). This Security Agreement shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors and permitted assignees.

     6.04 Any provision of this Security Agreement which is invalid, prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such invalidity, prohibition or unenforceability
without invalidating the remaining provisions hereof, and any such invalidity,
prohibition or unenforceability in any such jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction. Such invalid,
prohibited or unenforceable provision shall be replaced by another provision
coming nearest to the commercial intent of such replaced provision, however,
being not invalid, prohibited or unenforceable itself.

     6.05 The remedies specified herein shall be cumulative and in addition to
any other remedies available at law or in equity. No failure of either party to
enforce any provision hereof or to resort to any remedy or to exercise any one
or more alternate remedies and no delay in enforcing, resorting to or exercising
any remedy shall constitute a waiver by that party of its right subsequently to
enforce the same or any other provision hereof or to resort to any one or more
of such rights or remedies on account of any such ground then existing or which
may subsequently occur.


                                  Page 4 of 5
<PAGE>


     IN WITNESS WHEREOF, this Security Agreement has been executed under seal on
the day and year first above written by the parties hereto.


                                        US LEC OF NORTH CAROLINA L.L.C.
   
                                        By: /s/ David N. Vail
                                            ------------------------------------
                                        Name: David N. Vail
                                        Title: EVP-Finance and CFO



                                        US LEC OF GEORGIA L.L.C.

                                        By: /s/ David N. Vail
                                        Name: David N. Vail
                                        Title: EVP-Finance and CFO



                                        MELRICH ASSOCIATES, L.P.

                                        By: /s/ Richard T. Aab
                                            -----------------------------------
                                            Richard T. Aab, General Partner
    


                                  Page 5 of 5

   
                                  US LEC CORP.

                                 PROMISSORY NOTE


January 16, 1998                                               $1,000,000.00


     US LEC Corp., a Delaware  corporation (the  "Company"),  hereby promises to
pay to the order of Tansukh  V.  Ganatra  the  principal  amount of One  Million
Dollars  ($1,000,000)  together with interest  thereon  calculated from the date
hereof in accordance with the provisions of this Note.

     1.   Payment  of  Interest.  Interest  shall  accrue  at the rate of twelve
          percent  (12%) per annum on the unpaid  principal  amount of this Note
          outstanding  from time to time,  or (if less) at the highest rate then
          permitted under applicable law. The Company shall pay to the holder of
          this Note all accrued  interest  on the last day of each March,  June,
          September and December,  beginning March 30, 1998.  Unless  prohibited
          under  applicable  law, any accrued  interest which is not paid on the
          date on which it is due and  payable  shall bear  interest at the same
          rate at which  interest is then  accruing on the  principal  amount of
          this Note until such interest is paid. Any accrued  interest which for
          any reason has not theretofore  been paid shall be paid in full on the
          date on  which  the  final  principal  payment  on this  Note is made.
          Interest  shall  accrue on any  principal  payment due under this Note
          and, to the extent  permitted by applicable law, on any interest which
          has not been  paid on the date on  which it is due and  payable  until
          such time as payment  therefor is actually  delivered to the holder of
          this Note.

     2.   Payment of Principal on Note.

          (a)  Prepayments.  The Company  may, at any time and from time to time
               without  premium or  penalty,  prepay  all or any  portion of the
               outstanding  principal amount of the Notes, provided that (i) the
               Company has paid all  interest on the Notes  accrued  through the
               immediately  preceding  scheduled  interest payment date and (ii)
               the minimum  principal  amount so prepaid  shall be the lesser of
               $100,000 or the amount of principal  outstanding on the Notes. In
               connection  with each  prepayment  of  principal  hereunder,  the
               Company  shall also pay all  accrued  and unpaid  interest on the
               principal amount of the Notes being repaid.

          (b)  Principal   Repayment.   On  January  16,  2003  (the  "Scheduled
               Repayment Date"), the Company shall pay all outstanding principal
               and interest on the Notes.

    
<PAGE>


          (c)  Special Principal Repayments.

              (i)   If a Change in Control has  occurred or the Company  obtains
                    knowledge that a Change in Control is proposed to occur, the
                    Company shall give prompt  written  notice of such Change in
                    Control  describing in reasonable  detail the material terms
                    and date of consummation thereof to the holder of this Note,
                    but in any event such  notice  shall not be given later than
                    five days after the  occurrence  of such  Change in Control,
                    and the  Company  shall give the holder of this Note  prompt
                    written notice of any material change in the terms or timing
                    of such transaction. The holder of this Note may require the
                    Company to pay all or any  portion of the  principal  amount
                    remaining on this Note plus all unpaid accrued interest with
                    respect to such principal amount.

              (ii)  The Company  shall be  obligated to pay the amount set forth
                    in  subparagraph  (i) above  with  respect  to the Change in
                    Control.  If any proposed  Change in Control does not occur,
                    all requests for payment in  connection  therewith  shall be
                    automatically  rescinded,  or if there  has been a  material
                    change in the terms or the  timing of the  transaction,  the
                    holder of the Note may  rescind  its  request for payment by
                    giving written notice of such rescission to the Company.

              (iii) The term  "Change in Control"  means (a) any sale,  transfer
                    or issuance or series of sales,  transfers  and/or issuances
                    of Common Stock by the Company or any holders  thereof which
                    results  in any  Person  or  group of  Persons  (as the term
                    "group" is used under the  Securities  Exchange Act of 1934,
                    as amended),  owning  shares of Common Stock  entitling  the
                    owners thereof to more than 40% of the combined voting power
                    of all shares of Common Stock outstanding  immediately after
                    such  sale,   transfer  or  issuance  or  series  of  sales,
                    transfers  and/or issuances or (b) any change of 50% or more
                    of the members of the  Company's  Board of Directors  during
                    any 12 month  period if the  election  of the new members is
                    not  approved  or  recommended  by the  Company's  Board  of
                    Directors in office prior to such change.

              (iv)  If a  Fundamental  Change is proposed to occur,  the Company
                    shall  give  written  notice  of  such  Fundamental   Change
                    describing in reasonable  detail the material terms and date
                    of consummation  thereof to the holder of this Note not more
                    than 45 days nor less than 20 days prior to the consummation
                    of such Fundamental  Change,  and the Company shall give the
                    holder of this Note prompt  written  notice of any  material
                    change in the terms or timing


                                       2
<PAGE>


                    of such transaction. The holder of this Note may require the
                    Company to pay all or any  portion of the  principal  amount
                    remaining on this Note plus all unpaid accrued interest with
                    respect to such principal amount.

              (v)   The Company  shall be  obligated to pay the amount set forth
                    in  subparagraph  (iv) above upon the  consummation  of such
                    Fundamental Change. If any proposed  Fundamental Change does
                    not occur, all requests for payment in connection  therewith
                    shall be  automatically  rescinded,  or if there  has been a
                    material   change  in  the  terms  or  the   timing  of  the
                    transaction, the holder of this Note may rescind its request
                    for  payment by  delivering  written  notice  thereof to the
                    Company prior to the consummation of the transaction.

              (vi)  The term "Fundamental Change" means (a) any sale or transfer
                    of  more  than  50% of the  assets  of the  Company  and its
                    Subsidiaries  on a consolidated  basis  (measured  either by
                    book value in accordance with generally accepted  accounting
                    principles  consistently  applied  or by fair  market  value
                    determined  in the  reasonable  good faith  judgment  of the
                    Company's  board of directors) in any  transaction or series
                    of transactions  (other than sales in the ordinary course of
                    business) and (b) any merger or  consolidation  to which the
                    Company is a party, except for a merger in which the Company
                    is the  surviving  corporation,  and after giving  effect to
                    such  merger,  no  Person or group of  Persons  (as the term
                    "group"  is  used  under  the  Securities  Act of  1934,  as
                    amended) owns more than 40% of the combined  voting power of
                    all shares of Common  Stock  outstanding  immediately  after
                    such merger who did not own 40% or more of such voting power
                    of the Company prior to such merger.

     3.   Events of Default.

          (a)  Definition.  For purposes of this Note, an Event of Default shall
               be  deemed  to have  occurred  if any of the  following  exist or
               occur:

              (i)   the Company  fails to pay when due and  payable  (whether at
                    maturity or  otherwise)  the full  amount of  interest  then
                    accrued on any Note or the full amount of any  principal due
                    on any Note,  and such  failure  to pay is not cured  within
                    five days after the occurrence thereof; or

              (ii)  the Company  fails to perform or observe any other  material
                    covenant or  agreement  in this Note and such failure is not
                    cured


                                       3
<PAGE>


                    within  30 days  after the  earlier  of (A) the  receipt  of
                    notice  thereof  by the  holder  of  this  Note  or (B)  the
                    discovery thereof by the Company;

              (iii) US LEC of  Georgia  L.L.C.  and  US  LEC of  North  Carolina
                    L.L.C.  fail  to  perform  or  observe  any  other  material
                    covenant  or  agreement   in  that   Certain   Guaranty  and
                    Suretyship  Agreement  dated  as of  the  date  hereof  (the
                    "Payment  Default")  and such failure is not cured within 30
                    days after the earlier of (A) the receipt of notice  thereof
                    by the holder of this Note or (B) the  discovery  thereof by
                    the Company;

              (iv)  any representation,  warranty or information  required to be
                    furnished  to the  holder  is  misleading  in  any  material
                    respect  on the date  made or  furnished  and such  false or
                    misleading  representation,  warranty or information relates
                    to  a  material  adverse  effect  on  the  Company  and  its
                    Subsidiaries,  taken as a whole,  or  fails  to  disclose  a
                    material adverse change on the Company and its Subsidiaries,
                    taken as a whole;

              (v)   the Company or any  Subsidiary  makes an assignment  for the
                    benefit of creditors  or admits in writing its  inability to
                    pay its debts  generally  as they  become  due; or an order,
                    judgment  or decree is entered  adjudicating  the Company or
                    any  Subsidiary  bankrupt  or  insolvent;  or any  order for
                    relief  with  respect to the  Company or any  Subsidiary  is
                    entered under the Federal Bankruptcy Code; or the Company or
                    any Subsidiary  petitions or applies to any tribunal for the
                    appointment of a custodian,  trustee, receiver or liquidator
                    of the Company or any Subsidiary, or of any substantial part
                    of the assets of the Company or any Subsidiary, or commences
                    any  proceeding  (other than a proceeding  for the voluntary
                    liquidation and  dissolution of any Subsidiary)  relating to
                    the  Company  or  any   Subsidiary   under  any   bankruptcy
                    reorganization,  arrangement,  insolvency,  readjustment  of
                    debt,  dissolution  or  liquidation  under  the  law  of any
                    jurisdiction;  or any such petition or application is filed,
                    or any such proceeding is commenced,  against the Company or
                    any  Subsidiary  and  either  (A) the  Company  or any  such
                    Subsidiary  by  any  act  indicates  its  approval  thereof,
                    consent  thereto  or   acquiescence   therein  or  (B)  such
                    petition,  application or proceeding is not dismissed within
                    60 days;

              (vi)  a judgment in excess of  $500,000  is  rendered  against the
                    Company or any  Subsidiary  and,  within 60 days after entry
                    thereof,   such  judgment  is  not  discharged  in  full  or
                    execution thereof stayed


                                       4
<PAGE>


                    pending  appeal,  or within 60 days after the  expiration of
                    any such stay, such judgment is not discharged in full; or

              (vii) the Company or any  Subsidiary  defaults in the  performance
                    of any  obligation if the effect of such default is to cause
                    an amount  exceeding  $500,000  to  become  due prior to its
                    stated  maturity  or to permit the holder or holders of such
                    obligation to cause an amount  exceeding  $500,000 to become
                    due prior to its stated maturity.

                    The foregoing shall  constitute  Events of Default  whatever
                    the  reason  or cause  for any such  Event  of  Default  and
                    whether it is  voluntary  or  involuntary  or is effected by
                    operation  of law or  pursuant  to any  judgment,  decree or
                    order of any court or any order,  rule or  regulation of any
                    administrative or governmental body.

          (b)  Consequences of Events of Default.

              (i)   If  any  Event  of   Default  of  the  type   described   in
                    subparagraph 5(a)(i), 5(a)(ii) or 5(a)(iii) has occurred and
                    is continuing, the interest rate on this Note shall increase
                    immediately  to  15%  or  (if  less)  to  the  highest  rate
                    permitted  by law  and any  increase  of the  interest  rate
                    resulting  from the  operation  of this  subparagraph  shall
                    terminate  as of the close of  business on the date on which
                    no Event of Default of the type  described  in  subparagraph
                    5(a)(i) or 5(a)(ii) exists (subject to subsequent  increases
                    pursuant to this subparagraph).

              (ii)  If an Event of Default of the type described in subparagraph
                    5(a)(iv) has  occurred,  the aggregate  principal  amount of
                    this Note  (together with all accrued  interest  thereon and
                    all other  amounts due and  payable  with  respect  thereto)
                    shall become  immediately due and payable without any action
                    on the part of the  holder  of this  Note,  and the  Company
                    shall immediately pay to the holder of this Note all amounts
                    due and payable with respect to this Note.

              (iii) If any Event of Default has occurred and is continuing,  the
                    holder of this Note may  declare  all or any  portion of the
                    outstanding principal amount of this Note (together with all
                    accrued  interest  thereon  and all  other  amounts  due and
                    payable  with  respect  thereto) to be  immediately  due and
                    payable  and  may  demand  immediate  payment  of all or any
                    portion  of the  outstanding  principal  amount of this Note
                    (together with all such other amounts then due and payable).


                                       5
<PAGE>


              (iv)  The  holder of this Note  shall  also have any other  rights
                    which  he may have  been  afforded  under  any  contract  or
                    agreement at any time and any other rights which he may have
                    pursuant to applicable law.

              (v)   The Company hereby waives  diligence,  presentment,  protest
                    and demand and notice of protest  and demand,  dishonor  and
                    nonpayment of this Note and expressly agrees that this Note,
                    or any payment hereunder,  may be extended from time to time
                    and that the holder hereof may accept security for this Note
                    or release  security  for this Note,  all without in any way
                    affecting the liability of the Company hereunder.

     4.   Amendment and Waiver.  Except as otherwise  expressly provided herein,
          the  provisions  of this Note may be amended  and the Company may take
          any  action  herein  prohibited,  or omit to  perform  any act  herein
          required to be  performed  by it, only if the Company has obtained the
          written consent of the holder of this Note.

     5.   Definitions.  For  purposes of this Note,  the  following  capitalized
          terms have the following meaning:

          "Common  Stock" means the Company's  Common Stock,  par value $.01 per
          share, including all classes and series of such Common Stock.

          "Convertible  Securities"  means any stock or  securities  (other than
          options)  directly or indirectly  convertible into or exchangeable for
          Common Stock.

          "Person" means an individual, a partnership,  a corporation, a limited
          liability company,  an association,  a joint stock company, a trust, a
          joint  venture,  an  unincorporated  organization  and a  governmental
          entity or any department, agency or political subdivision thereof.

          "Subsidiary"  means,  with respect to any Person,  any Person of which
          (i) if a corporation or a limited  liability company which is taxed as
          a  corporation  for federal  purposes,  a majority of the total voting
          power of shares of stock entitled (without regard to the occurrence of
          any  contingency)  to vote in the election of  directors,  managers or
          trustees  thereof  is at the time  owned or  controlled,  directly  or
          indirectly,  by  the  first  Person  or  one  or  more  of  the  other
          Subsidiaries of the first Person or a combination  thereof, or (ii) if
          a  limited  liability  company  (which is taxed as a  partnership  for
          federal tax  purposes),  partnership,  association  or other  business
          entity,  a majority  of the  partnership  or other  similar  ownership
          interest  thereof  is at the time  owned or  controlled,  directly  or
          indirectly,  by any Person or one or more  Subsidiaries  of that first
          Person or a  combination  thereof.  For purposes  hereof,  a Person or
          Persons  shall be deemed to have a majority  ownership  interest  in a
          limited liability company (which is taxed as a partnership


                                       6
<PAGE>


          for federal tax purposes), partnership,  association or other business
          entity if such  Person or Persons  shall be  allocated  a majority  of
          limited liability company, partnership,  association or other business
          entity gains or losses or shall be or control any managing director or
          general  partner  of  such  limited  liability  company,  partnership,
          association or other business entity.

     6.   Cancellation.  After all  principal  and accrued  interest at any time
          owed on this Note has been paid in full,  this Note shall  surrendered
          to the Company for cancellation and shall not be reissued.

     7.   Payments.  Unless otherwise expressly provided herein, all payments to
          be made to the holders of this Note shall be made in the lawful  money
          of the United States of America in immediately available funds.

     8.   Place  of  Payment.  Payments  of  principal  and  interest  shall  be
          delivered to Tansukh V. Ganatra at the following address:

               Tansukh V. Ganatra
               6523 Ashdale Place
               Charlotte, North Carolina 28215

          or to such other  address or to the  attention of such other person as
          specified by prior written notice to the Company.

     9.   Business  Days.  If any  payment is due, or any time period for giving
          notice or taking action expires, on a day which is a Saturday,  Sunday
          or  legal  holiday  in the  State  of New  York or the  State of North
          Carolina, the payment shall be due and payable on, and the time period
          shall  automatically be extended to, the next business day immediately
          following such Saturday,  Sunday or legal holiday,  and interest shall
          continue  to  accrue at the  required  rate  hereunder  until any such
          payment is made.

     10.  Usury Laws.  It is the intention of the Company and the holder of this
          Note to conform strictly to all applicable usury laws now or hereafter
          in force, and any interest payable under this Note shall be subject to
          reduction  to the amount  not in excess of the  maximum  legal  amount
          allowed under the applicable usury laws as now or hereafter  construed
          by the courts having  jurisdiction over such matters.  If the maturity
          of this Note is  accelerated  by reason of an  election  by the holder
          hereof resulting from an Event of Default, voluntary prepayment by the
          Company or otherwise, then earned interest may never include more that
          the maximum  amount  permitted by law shall be canceled  automatically
          and, if  theretofore  paid,  shall at the option of the holder  hereof
          either be rebated to the Company or credited on the  principal  amount
          of this Note, or if this Note has been paid,  then the excess shall be
          rebated  to  the  Company.  The  aggregate  of all  interest  (whether
          designated  as  interest,   service  charges,   points  or  otherwise)
          contracted for,


                                       7
<PAGE>


          chargeable or receivable  under this Note shall under no circumstances
          exceed the  maximum  legal rate upon the unpaid  principal  balance of
          this Note  remaining  unpaid from time to time.  If such interest does
          exceed the maximum  legal rate,  it shall be deemed a mistake and such
          excess  shall be  canceled  automatically  and, if  theretofore  paid,
          rebated to the  Company or credited  on the  principal  amount of this
          Note,  or if this  Note has been  repaid,  then such  excess  shall be
          rebated to the Company.

     11.  Notices.  All  notices,  requests and other  communications  hereunder
          shall be in  writing  and will be deemed  to have been duly  given (a)
          when personally delivered,  (b) when sent by telefax to a party at the
          number   listed   below  for  such  party   provided  the  sender  has
          machine-produced  evidence  of  successful  transmission,  (c) two (2)
          Business  Days  after  the day on which  the  same has been  delivered
          prepaid to a national  overnight courier service providing evidence of
          delivery  or (d) three (3)  Business  Days  after the day on which the
          same was deposited in the United States mail, registered or certified,
          return receipt requested,  postage prepaid,  in each case addressed to
          the party to whom such notice is to be given at the following  address
          for such party:
   
               US LEC Corp.
               212 South Tryon Street, Suite 1540
               Charlotte, North Carolina 28281
               Telefax: (704) 319-1345
               Attn: Chief Financial Officer

               Tansukh V. Ganatra
               6523 Ashdale Place
               Charlotte, North Carolina 28215
               Telefax: ________________________

    

     IN WITNESS WHEREOF, the Company has executed and delivered this Note on the
date set forth above.



US LEC Corp., a Delaware corporation


By:  /s/ David N. Vail
     ------------------------------------------
     David N. Vail, Executive Vice President
     Finance and Chief Financial Officer



ATTEST:                            [SEAL]


                                       8
<PAGE>


By:  /s/ Richard T. Aab
     -------------------------------
     Richard T. Aab, Secretary


                                       9


   
                               SECURITY AGREEMENT

     THIS SECURITY AGREEMENT, dated as of the 16th day of January, 1998 (the
"Security Agreement"), is made by and between US LEC OF GEORGIA L.L.C., a
Delaware limited liability company and US LEC OF NORTH CAROLINA, L.L.C., a North
Carolina limited liability company (the "Debtors"), on the one hand and TANSUKH
V. GANATRA, a resident of Charlotte, North Carolina ("Ganatra" or "Secured
Party") on the other hand.

     The Company has borrowed an aggregate of $1,000,000 from Secured Party,
evidenced by promissory note dated January 16, 1998 (the "Note").
    
     Accordingly, in consideration of the premises and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged,
Debtors and the Secured Party hereby agree as follows:

                                    ARTICLE I
                                   Definitions

     1.01 The term "Accounts Receivable" means all present and/or future
accounts, accounts receivable, receivables, contracts, contract rights, book
debts, checks, notes, drafts, instruments, chattel paper, documents,
acceptances, choses in action, any and all amounts due to Debtors from a factor
or other purchaser of accounts receivable of Debtors, and other forms of
obligations and receivables, together with all proceeds thereof, all monies due
and to become due thereon and all returned or repossessed goods, now or
hereafter owned or held by or payable to Debtors.

     1.02 The term "Debtors' Liabilities" wherever used in this Security
Agreement shall mean the indebtedness owing, due or payable from Debtors to the
Secured Party under the Notes.

     1.03 The term "Machinery, Equipment, and Fixtures" means all machinery,
equipment, furniture, rolling stock, vehicles and fixtures owned by Debtors of
every kind and description including, without limitation, switching equipment,
fixtures, accessories, office equipment, office furnishing, together with all
other machinery, equipment, and fixtures wherever located, now owned by the
Debtors, or whenever from time to time hereafter acquired by Debtors.

     1.04 All of the other terms in this Security Agreement shall have the
meanings provided by the Uniform Commercial Code of North Carolina to the extent
the same are used or defined therein.

                                   ARTICLE II
                          Creation of Security Interest

     2.01 To secure the repayment to Secured Party of Debtors' Liabilities,
Debtors hereby grant to Secured Party a security interest in Debtors' presently
owned or hereafter acquired Accounts Receivable, Machinery, Equipment, and
Fixtures (including but not limited to telecommunications switches manufactured
by Lucent Technologies, Inc.), and all proceeds, including without limitation,
insurance proceeds, of the foregoing collateral. The property and interest in
property described in this paragraph 2.01 are sometimes hereinafter collectively
referred to as the "Collateral."


                                  Page 1 of 5
<PAGE>


     2.02 Debtors shall execute and deliver to Secured Party concurrently with
the execution of this Security Agreement, and at any time or times hereafter at
the request of the Secured Party, all assignments, certificates of title,
conveyances, assignment statements, financing statements, renewal financing
statements, security agreements, affidavits, notices and all other agreements,
instruments and documents that the Secured Party may reasonably request, in form
satisfactory to the Secured Party and agrees to take any and all other steps
reasonably requested by the Secured Party, in order to perfect and maintain the
security interests and liens granted herein by Debtors to Secured Party. A
carbon, photographic or other reproduction of this Security Agreement or a
financing statement is sufficient and may be used as a financing statement under
this Security Agreement.

     2.03 Debtors do hereby irrevocably make, constitute and appoint Ganatra as
the true and lawful attorney of Debtors with power to sign the name of Debtors
on any financing statement, renewal financing statement, notice or any similar
document which, in Ganatra's reasonable opinion, must be filed in order to
perfect or continue the perfection of the security interests granted in this
Security Agreement. This power, being coupled with an interest, is irrevocable
so long as any of the Debtors' Liabilities remain unpaid.

                                   ARTICLE III
                         Priority of Security Interests

     3.01 Debtors warrant and represent that (a) the security interest granted
to Secured Party hereunder, when properly perfected by filing, shall constitute
at all times a valid and perfected security interest in the Collateral, vested
in Secured Party in and upon all of the Collateral and (b) if such security
interests are perfected on a timely basis, said security interests in said
Collateral shall not become subordinate or junior to the security interests,
liens or claims of any other person, firm or corporation, including the United
States or any department, agency or instrumentality thereof, or any state,
county or local governmental agency. Debtors shall not grant (without the prior
written approval of Secured Party) a security interest in or permit a lien or
encumbrance upon any of the Collateral to anyone as long as any of Debtors'
Liabilities remain unpaid (other than purchase money security interests or liens
and encumbrances related to seller financing and other than the security
interests granted in the Security Agreements and UCC-1 financing statements
dated the date hereof between Debtors, on the one hand, and Richard T. Aab and
Melrich Associates, L.P., on the other hand).


                                  Page 2 of 5
<PAGE>


     3.02 Debtors represent and warrant that it is now and at all times
hereafter shall be the sole owner of its Machinery, Equipment, and Fixtures,
free and clear of all liens, encumbrances and security interests, except the
security interests and rights of Secured Party herein and purchase money
security interests or liens and encumbrances related to seller financing. Except
for all unused or obsolete Machinery, Equipment, and Fixtures, Debtors will keep
the Machinery, Equipment, and Fixtures in good repair and maintained in a
reasonable state of proper operating efficiency, and will make all necessary
repairs to and replacements of Machinery, Equipment, and Fixtures so that the
proper operating efficiency thereof shall at all times be maintained consistent
with prudent business practices. Debtors may only sell or otherwise dispose of
Machinery, Equipment and Fixtures (a) in the ordinary course of business or (b)
when the aggregate book value of the Machinery, Equipment and Fixtures to be
sold by Debtors in any one sale (or series of related sales or disposals
occurring during any three (3) calendar month period) does not exceed $50,000.

     3.03 Debtors represent and warrant that it is now and at all times
hereafter shall be the absolute owner, free and clear of all liens, encumbrances
and security interests of indefeasible title to its Accounts Receivable (except
the security interest and rights of Secured Party granted herein, purchase money
security interests and liens and encumbrances related to seller financing and
except as consent may be granted by Secured Party).

                                   ARTICLE IV
                                    Insurance

     The Debtors shall maintain insurance on all of the Machinery, Equipment and
Fixtures in accordance with the requirements of Exhibit A hereto, at its
expense. Certified copies of all such insurance policies shall be delivered to
the Secured Party promptly upon request. If requested by the Secured Party, such
notice shall name the Secured Party as loss payee and require thirty (30) days
notice to Secured Party prior to their termination or expiration. If the Debtors
shall at any time or times hereafter fail to obtain and maintain any of the
policies of insurance required above, or fail to pay any premium in whole or in
part relating to any such policies, then the Secured Party may, but he shall
have no obligation to do so, obtain and cause to be maintained any or all of
such policies, and pay any part or all of the premiums due thereunder, without
thereby waiving any default by the Debtors and any sum so disbursed by the
Secured Party shall become a part of the Debtors' Liabilities secured by the
Collateral, payable on demand.

                                    ARTICLE V
                                     Default

     5.01 Any one of the following events will constitute an Event of Default
hereunder:

          (a) An acceleration of the Note pursuant to its terms; and

          (b) failure by the Debtors to comply with the terms and conditions of
     this Security Agreement.

     5.02 Upon the occurrence of an Event of Default hereunder and at any time
thereafter the Secured Party (a) may, at his election, declare all of the
Debtors' Liabilities immediately due and payable; and (b) shall have all rights
and remedies of a secured party under the Uniform


                                  Page 3 of 5
<PAGE>


Commercial Code in addition to all other rights and remedies available at law or
in equity, all such rights and remedies being cumulative, not exclusive and
enforceable alternatively, successively or concurrently.

     5.03 If at any time or times hereafter the Secured Party employs counsel to
enforce any rights of the Secured Party or liabilities of the Debtors, account
debtors, or any person, firm or corporation which may be obligated to the
Secured Party by virtue of this Security Agreement, then in any of such events,
all of the reasonable attorneys' fees arising from such services, and any
expenses, costs and charges relating thereto, shall become a part of the
Debtors' Liabilities and shall be secured by the Collateral, payable on demand.

                                   ARTICLE VI
                                  Miscellaneous

     6.01 This Security Agreement shall be binding upon and inure to the benefit
of the successors and assigns of the parties hereto.

     6.02 The internal laws and decisions of the State of North Carolina shall
govern and control the construction, enforceability, validity and interpretation
of this Security Agreement.

     6.03 This Security Agreement contains the final, complete and exclusive
statement of the agreement between the parties with respect to the transactions
contemplated herein and all prior written agreements and all prior and
contemporaneous oral agreements with respect to the subject matter hereof are
merged herein. This Security Agreement may not be amended, supplemented or
modified (or any right or power granted hereunder waived) except by a written
instrument signed by the parties hereto (or in the case of a waiver, signed by
the party to be bound thereby). This Security Agreement shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors and permitted assignees.

     6.04 Any provision of this Security Agreement which is invalid, prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such invalidity, prohibition or unenforceability
without invalidating the remaining provisions hereof, and any such invalidity,
prohibition or unenforceability in any such jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction. Such invalid,
prohibited or unenforceable provision shall be replaced by another provision
coming nearest to the commercial intent of such replaced provision, however,
being not invalid, prohibited or unenforceable itself.

     6.05 The remedies specified herein shall be cumulative and in addition to
any other remedies available at law or in equity. No failure of either party to
enforce any provision hereof or to resort to any remedy or to exercise any one
or more alternate remedies and no delay in enforcing, resorting to or exercising
any remedy shall constitute a waiver by that party of its right subsequently to
enforce the same or any other provision hereof or to resort to any one or more
of such rights or remedies on account of any such ground then existing or which
may subsequently occur.


                                  Page 4 of 5
<PAGE>


     IN WITNESS WHEREOF, this Security Agreement has been executed under seal on
the day and year first above written by the parties hereto.



                                        US LEC OF NORTH CAROLINA L.L.C.
   
                                        By: /s/ Richard T.Aab
                                            -----------------------------------
                                        Name: Richard T. Aab
                                              ----------------------------------
                                        Title: Chairman & CEO
                                               --------------------------------



                                        US LEC OF GEORGIA L.L.C.

                                        By: /s/ Richard T. Aab
                                           -------------------------------------
                                        Name: Richard T. Aab
                                              ----------------------------------
                                        Title: Chairman & CEO
                                               ---------------------------------


                                          /s/ Tansukh V. Ganatra
                                        _______________________________________
                                             Tansukh V. Ganatra


                                  Page 5 of 5
    

   
                        GUARANTY AND SURETYSHIP AGREEMENT

     THIS GUARANTY AND SURETYSHIP AGREEMENT (the "Guaranty Agreement" or the
"Guaranty"), dated as of January 16, 1998, is made by each of the undersigned
(each a "Guarantor" and collectively the "Guarantors") to each of Richard T.
Aab, a resident of Rochester, New York, Tansukh V. Ganatra, a resident of
Charlotte, North Carolina and Melrich Associates, L.P., a New York limited
partnership (each a "Lender" and collectively the "Lenders").

                              W I T N E S S E T H:

     WHEREAS, US LEC Corp., a Delaware corporation (the "Borrower"), has
executed a separate Promissory Note in favor of each Lender, each dated January
16, 1998 (as from time to time amended, modified or supplemented, the "Notes")
pursuant to which the Lenders have loaned to the Borrower, collectively,
$8,289,150 (the "Loans"); and
    
     WHEREAS, Borrower owns a 99% equity interest in each of the Guarantors; and

     WHEREAS, the Borrower is required to cause each Guarantor to guarantee to
the Lenders payment of the Borrower's Liabilities (as hereinafter defined) in
accordance with the terms of this Agreement; and

     WHEREAS, each Guarantor will materially benefit from the loans made under
the Notes, and each Guarantor is willing to enter into this Guaranty to provide
an inducement for the Lenders to make the loans under the Notes;

     NOW, THEREFORE, in order to induce the Lenders to make loans to the
Borrower under the Notes, each Guarantor agrees as follows:

     1. Definitions. All capitalized terms not otherwise defined herein shall
have the meanings ascribed to such terms in the Notes.

     2. Guaranty. Each Guarantor hereby jointly and severally, unconditionally,
absolutely, continually and irrevocably guarantees to the Lenders the payment
and performance in full of the Borrower's Liabilities (as defined below);
provided, however, that the liability of each Guarantor with respect to the
Guarantors' Obligations (as defined below) shall not exceed at any time the
Maximum Amount (as defined below). For all purposes of this Guaranty Agreement,
"Borrower's Liabilities" means: (a) the Borrower's prompt payment in full, when
due or declared due and at all such times, of all obligations and all other
amounts pursuant to the terms of the Notes, now or at any time or times
hereafter owing, arising, due or payable from the Borrower to the Lenders,
including, but not limited to, principal, interest, premium or fee (including,
but not limited to, loan fees and attorneys' fees and expenses); and (b) the
Borrower's prompt, full and faithful performance, observance and discharge of
each and every agreement, undertaking, covenant and provision to be performed,
observed or discharged by the Borrower under the Notes. Each Guarantor's
obligations to the Lenders under this Guaranty Agreement


<PAGE>


are hereinafter collectively referred to as the "Guarantors' Obligations". The
"Maximum Amount" means the greater of (X) the aggregate amount of all advances
to such Guarantor made directly or indirectly with the proceeds of Loans and not
theretofore repaid by such Guarantor or (Y) 95% of (i) the fair salable value of
the assets of such Guarantor as of the date hereof minus (ii) the total
liabilities of such Guarantor (including contingent liabilities, but excluding
liabilities of such Guarantor under this Guaranty and under the Security
Agreements dated as of the date hereof executed by such Guarantor in connection
with entering into this Guaranty (the "Security Agreements")) as of the date
hereof; provided further, however, that, if the calculation of the Maximum
Amount in the manner provided above as of the date payment is required of such
Guarantor pursuant to this Guaranty would result in a greater positive number,
then the Maximum Amount shall be deemed to be such greater positive number.

     Each Guarantor agrees that it is jointly and severally, directly and
primarily liable for the Borrower's liabilities, subject to the limitations and
conditions set forth herein.

     3. Payment. If the Borrower shall default in payment or performance of any
Borrower's Liabilities, whether principal, interest, premium, fee (including,
but not limited to, loan fees and attorneys' fees and expenses), or otherwise,
when and as the same shall become due, whether according to the terms of the
Notes, by acceleration, or otherwise, or upon the occurrence of any other Event
of Default under the Notes that has not been cured or waived, then each
Guarantor, upon demand thereof by the Lenders or their successors or assigns,
will AS OF THE DATE OF THE DEMAND fully pay to the Lenders, subject to any
restrictions and limitations set forth in Section 2 hereof, an amount equal to
all Guarantor's Obligations then due and owing.

     4. Unconditional Obligations. This is a guaranty of payment and not of
collection. The Guarantors' Obligations under this Guaranty Agreement shall be
joint and several, absolute and unconditional irrespective of the validity,
legality or enforceability of the Notes or the Security Agreements or any other
guaranty of the Borrower's Liabilities, and shall not be affected by any action
taken under the Notes or any other guaranty of the Borrower's Liabilities, or
any other agreement between the Lenders and the Borrower or any other Person, in
the exercise of any right or power therein conferred, or by any failure or
omission to enforce any right conferred thereby, or by any waiver of any
covenant or condition therein provided, or by any acceleration of the maturity
of any of the Borrower's Liabilities, or by the release or other disposal of any
security for or guarantee of any of the Borrower's Liabilities, or by the
dissolution of the Borrower or the combination or consolidation of the Borrower
into or with another entity or any transfer or disposition of any assets of the
Borrower or by any extension or renewal of any of the Notes or the Security
Agreements, in whole or in part, or by any modification, alteration, amendment
or addition of or to any of the Notes or any of the Security Agreements, any
other guaranty of the Borrower's Liabilities, or any other agreement between the
Lenders and the Borrower or any other Person, or by any other circumstance
whatsoever (with or without notice to or knowledge of any Guarantor) which may
or might in any manner or to any extent vary the risks of any Guarantor, or
might otherwise constitute a legal or equitable discharge of a surety or
guarantor; it being the purpose and intent of the parties hereto that this


                                       2
<PAGE>


Guaranty Agreement and the Guarantors' Obligations hereunder shall be absolute
and unconditional under any and all circumstances and shall not be discharged
except by payment as herein provided or as provided in the Notes or Security
Agreements.

     5. Currency and Funds of Payment. Each Guarantor hereby guarantees that the
Guarantors' Obligations will be paid in lawful currency of the United States of
America and in immediately available funds, regardless of any law, regulation or
decree now or hereafter in effect that might in any manner affect the Borrower's
Liabilities, or the rights of any Lender with respect thereto as against the
Borrower, or cause or permit to be invoked any alteration in the time, amount or
manner of payment by the Borrower of any or all of the Borrower's Liabilities.

     6. Events of Default. In the event that (a) there shall occur an Event of
Default under the Notes (b) there shall occur an Event of Default under the
Security Agreements; (c) any default shall occur in the payment of amounts due
hereunder; or (d) any other default shall occur hereunder which remains uncured
or unwaived for a period of thirty (30) days (each of the foregoing an "Event of
Default" hereunder); then notwithstanding any collateral available to the
Lenders from the Borrower or any Guarantor or any other guarantor of the
Borrower's Liabilities, or any other party, at the election of the Lenders and
without notice thereof or demand therefor, so long as such Event of Default
shall not have been waived, the Guarantors' Obligations shall become immediately
due and payable.

     7. Suits. Each Guarantor from time to time shall pay to the Lenders, on
demand, at the Lenders' principal office or such other address as the Lenders
shall give notice of to the Guarantor, the Guarantors' Obligations as they
become or are declared due, and in the event such payment is not made forthwith,
the Lenders or any of them may proceed to suit against any one or more or all of
the Guarantors. At the election of the Lenders, one or more and successive or
concurrent suits may be brought hereon by the Lenders against any one or more or
all of the Guarantors, whether or not suit has been commenced against the
Borrower, any other guarantor of the Borrower's Liabilities, or any other Person
and whether or not any Lender has taken or failed to take any other action to
collect all or any portion of the Borrower's Liabilities.

     8. Set-Off and Waiver. Each Guarantor waives any right to assert against
the Lenders as a defense, counterclaim, set-off or cross claim any claim (legal
or equitable) which such Guarantor may now or at any time hereafter have against
the Borrower without waiving any additional defenses, set-offs, counterclaims or
other claims otherwise available to such Guarantor. If at any time hereafter any
Lender employs counsel for advice or other representation to enforce the
Guarantors' Obligations that arise out of an Event of Default, then, in any of
the foregoing events, all of the reasonable attorneys' fees arising from such
services and all reasonable expenses, costs and charges in any way or respect
arising in connection therewith or relating thereto shall be jointly and
severally paid by the Guarantors to the Lenders, on demand.

     9. Waiver; Subrogation; Subordination.


                                       3
<PAGE>


     (a) Each Guarantor hereby waives notice of the following events or
occurrences: (i) the Lenders' acceptance of this Guaranty Agreement; (ii) the
Lenders' heretofore, now or from time to time hereafter loaning monies or giving
or extending credit to or for the benefit of the Borrower, whether pursuant to
the Notes, or any amendments, modifications, or supplements thereto, or
replacements or extensions thereof; (iii) the Lenders or the Borrower
heretofore, now or at any time hereafter, obtaining, amending, substituting for,
releasing, waiving or modifying the Notes; (iv) presentment, demand, notices of
default, non-payment, partial payment and protest; (v) the Lenders heretofore,
now or at any time hereafter granting to the Borrower (or any other party liable
to the Lenders on account of the Borrower's Liabilities) any indulgence or
extensions of time of payment of or in respect of the Borrower's Liabilities;
and (vi) the Lenders heretofore, now or at any time hereafter accepting from the
Borrower or any other person, any partial payment or payments on account of the
Borrower's Liabilities or any collateral securing the payment thereof or the
Lenders settling, subordinating, compromising, discharging or releasing the same
in whole or in part. Each Guarantor agrees that each Lender may heretofore, now
or at any time hereafter do any or all of the foregoing in such manner, upon
such terms and at such times as each Lender, in its sole and absolute
discretion, deems advisable, without in any way or respect impairing, affecting,
reducing or releasing such Guarantor from the Guarantors' Obligations, (b) each
Guarantor hereby consents to each and all of the foregoing events or occurrences
and (c) each Guarantor waives, to the extend permitted by law, (1) any right of
a surety or guarantor to any defense, discharge, release or diminution of its
liabilities hereunder as a result of any of the foregoing events or occurrences,
and (2) any right under N.C.G.S. Section 26-7 through 26-9 inclusive or
otherwise or require that resort be had to the Borrower or any other guarantor
of, or any property securing, all or any part of the Borrower's Liabilities.

     (b) Each Guarantor hereby agrees that payment or performance by such
Guarantor of the Guarantors' Obligations under this Guaranty Agreement may be
enforced by the Lenders upon demand by the Lenders to such Guarantor without the
Lenders being required, each Guarantor expressly waiving any right it may have
to require the Lenders, to (i) prosecute collection or seek to enforce or resort
to any remedies against the Borrower or any other Guarantor or any other
guarantor of the Borrower's Liabilities, IT BEING EXPRESSLY UNDERSTOOD,
ACKNOWLEDGED AND AGREED TO BY EACH GUARANTOR THAT DEMAND UNDER THIS GUARANTY
AGREEMENT MAY BE MADE BY THE LENDERS, AND THE PROVISIONS HEREOF ENFORCED BY THE
LENDERS, EFFECTIVE AS OF THE FIRST DATE ANY EVENT OF DEFAULT (AS DEFINED IN THE
NOTES) OCCURS AND IS CONTINUING UNDER ANY OF THE NOTES, or (ii) seek to enforce
or resort to any remedies with respect to any security interests, liens or
encumbrances granted to the Lenders by the Borrower or any other Person on
account of the Borrower's Liabilities or any guaranty thereof. No Lender shall
have any obligation to protect, secure or insure any of the foregoing security
interests, liens or encumbrances on the properties or interests in properties
subject thereto. The Guarantors' Obligations shall in no way be impaired,
affected, reduced, or released by reason of any Lender's failure or delay to do
or take any of the acts, actions or things described in this Guaranty Agreement
including, without limiting the generality of the foregoing, those acts, actions
and things described in this Section 9.


                                       4
<PAGE>


     (c) Each Guarantor further agrees with respect to this Guaranty Agreement
that such Guarantor shall have no right of subrogation, contribution,
reimbursement or indemnity, nor any right of recourse to security for the
Borrower's Liabilities until the Borrower's Obligations under the Notes have
been fully, finally and irrevocably paid and satisfied.

     (d) Until the Borrower's Obligations under the Notes have been fully,
finally and irrevocably paid and satisfied, each Guarantor hereby
unconditionally subordinates all present and future debts, liabilities or
obligations of the Borrower to such Guarantor to the Borrower's Liabilities, and
all amounts due under such debts, liabilities, or obligations shall, upon the
occurrence and during the continuance of an Event of Default, be collected and
paid over forthwith to the Lenders on account of the Borrower's Liabilities and,
pending such payment, shall be held by such Guarantor as agent and bailee of the
Lenders separate and apart from all other funds, property and accounts of such
Guarantor. Guarantor, at the request of the Lenders, shall execute such further
documents in favor of the Lenders to further evidence and support the purpose of
this Section 9(d).

     10. Effectiveness; Enforceability. This Guaranty Agreement shall be
effective as of the date hereof, and shall continue in full force and effect
until all of the Borrower's Obligations (other than obligations in the nature of
continuing indemnities and liability for expenses which are not yet due and
payable, which shall survive as an obligation guarantied by the Guarantors
hereunder notwithstanding any termination hereof) are fully, finally and
irrevocably paid and satisfied. The Lenders shall give each Guarantor written
notice of such termination at each Guarantor's address set forth below such
Guarantor's execution hereof on the signature pages of this Guaranty or such
other address for the Guarantor as such Guarantor shall give notice to the
Lenders in the manner provided for the giving of notices under the Notes (the
"Guarantor's Address"). This Guaranty Agreement shall be binding upon and inure
to the benefit of each Guarantor, the Lenders and their respective successors
and assigns. Notwithstanding the foregoing, no Guarantor may, without the prior
written consent of the Lenders, assign any rights, powers, duties or obligations
hereunder. Any claim or claims that the Lenders may at any time hereafter have
against any Guarantor under this Guaranty Agreement may be asserted by any
Lender by written notice directed to any one or more or all of the Guarantors at
the applicable Guarantor's Address.

     11. Representations and Warranties. Each Guarantor warrants and represents
to the Lenders that it is duly authorized to execute, deliver and perform this
Guaranty Agreement, that this Guaranty Agreement is legal, valid, binding and
enforceable against such Guarantor in accordance with its terms except as
enforceability may be limited by bankruptcy, insolvency, reorganization,
moratorium or similar laws affecting the enforcement of creditors' rights
generally and by general equitable principles; and that such Guarantor's
execution, delivery and performance of this Guaranty Agreement do not violate or
constitute a breach of any of its charter or governance documents or any
agreement to which such Guarantor is a party, or any law, order, rule,
regulation, decree or award of any applicable governmental authority or arbitral
body.


                                       5
<PAGE>


     12. Expenses. Each Guarantor agrees to be liable for the payment of all
reasonable fees and expenses, including without limitation attorney's fees,
incurred by any Lender in connection with the enforcement of this Guaranty
Agreement, whether or not suit be brought.

     13. Reinstatement. Each Guarantor agrees that this Guaranty Agreement shall
continue to be effective or be reinstated, as the case may be, at any time
payment received by the Lenders under the Notes or the Security Agreements or
this Guaranty Agreement is rescinded or must be restored for any reason.

     14. Counterparts. This Guaranty Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original as against any
party whose signature appears thereon, and all of which shall constitute one and
the same instrument.

     15. Reliance. Each Guarantor represents and warrants to the Lenders, that:
(a) such Guarantor has adequate means to obtain from Borrower, on a continuing
basis, information concerning Borrower and Borrower's financial condition and
affairs and has full and complete access to Borrower's books and records; (b)
such Guarantor is not relying on any Lender, or its or their employees, agents
or other representatives, to provide such information, now or in the future; (c)
such Guarantor is executing this Guaranty Agreement freely and deliberately, and
understands the obligations and financial risks undertaken by providing this
Guaranty; (d) such Guarantor has relied solely on the Guarantor's own
independent investigation, appraisal and analysis of Borrower and Borrower's
financial condition and affairs in deciding to provide this Guaranty and is
fully aware of the same; and (e) such Guarantor has not depended or relied on
any Lender, or his or its employees, agents or representatives, for any
information whatsoever concerning Borrower or Borrower's financial condition and
affairs or other matters material to such Guarantor's decision to provide this
Guaranty or for any counseling, guidance, or special consideration or any
promise therefor with respect to such decision. Each Guarantor agrees that no
Lender has any duty or responsibility whatsoever, now or in the future, to
provide to any Guarantor any information concerning Borrower or Borrower's
financial condition and affairs, other than as expressly provided herein, and
that, if such Guarantor receives any such information from any Lender, its or
their employees, agents or other representatives, such Guarantor will
independently verify the information and will not rely on any Lender, or its or
their employees, agents or other representatives, with respect to such
information.

     16. Governing Law.

          (a) THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE
     WITH, THE LAWS OF THE STATE OF NORTH CAROLINA APPLICABLE TO CONTRACTS
     EXECUTED, AND TO BE FULLY PERFORMED, IN SUCH STATE.

          (b) EACH PARTY HEREBY EXPRESSLY AND IRREVOCABLY AGREES AND CONSENTS
     THAT ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS
     AGREEMENT AND THE


                                       6
<PAGE>


     TRANSACTIONS CONTEMPLATED HEREIN MAY BE INSTITUTED IN ANY STATE OR FEDERAL
     COURT SITTING IN THE COUNTY OF MECKLENBURG, STATE OF NORTH CAROLINA, UNITED
     STATES OF AMERICA AND, BY THE EXECUTION AND DELIVERY OF THIS AGREEMENT,
     EXPRESSLY WAIVES ANY OBJECTION THAT IT MAY HAVE NOW OR HEREAFTER TO THE
     LAYING OF THE VENUE OR TO THE JURISDICTION OF ANY SUCH SUIT, ACTION OR
     PROCEEDING, AND IRREVOCABLY SUBMITS GENERALLY AND UNCONDITIONALLY TO THE
     NONEXCLUSIVE JURISDICTION OF ANY SUCH COURT IN ANY SUCH SUIT, ACTION OR
     PROCEEDING.

          (c) EACH PARTY AGREES THAT SERVICE OF PROCESS MAY BE MADE BY PERSONAL
     SERVICE OF A COPY OF THE SUMMONS AND COMPLAINT OR OTHER LEGAL PROCESS IN
     ANY SUCH SUIT, ACTION OR PROCEEDING, OR BY REGISTERED OR CERTIFIED MAIL
     (POSTAGE PREPAID) TO THE GUARANTOR'S ADDRESS (AS HEREIN DEFINED) FOR EACH
     GUARANTOR AND AT THE ADDRESS OF SUCH OTHER PARTY PROVIDED IN THE NOTES OR
     SECURITY AGREEMENTS OR BY ANY OTHER METHOD OF SERVICE PROVIDED FOR UNDER
     THE APPLICABLE LAWS IN EFFECT IN THE STATE OF NORTH CAROLINA.

          (d) NOTHING CONTAINED IN SUBSECTIONS (b) OR (c) HEREOF SHALL PRECLUDE
     ANY PARTY FROM BRINGING ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR
     RELATING TO THIS AGREEMENT OR THE NOTES OR THE SECURITY AGREEMENTS IN THE
     COURTS OF ANY PLACE WHERE ANY OTHER PARTY OR ANY OF SUCH PARTY'S PROPERTY
     OR ASSETS MAY BE FOUND OR LOCATED. TO THE EXTENT PERMITTED BY THE
     APPLICABLE LAWS OF ANY SUCH JURISDICTION, EACH PARTY HEREBY IRREVOCABLY
     SUBMITS TO THE JURISDICTION OF ANY SUCH COURT AND EXPRESSLY WAIVES, IN
     RESPECT OF ANY SUCH SUIT, ACTION OR PROCEEDING, THE JURISDICTION OF ANY
     OTHER COURT OR COURTS WHICH NOW OR HEREAFTER, BY REASON OF ITS PRESENT OR
     FUTURE DOMICILE, OR OTHERWISE, MAY BE AVAILABLE TO IT.

          (e) IN ANY ACTION OR PROCEEDING TO ENFORCE OR DEFEND ANY RIGHTS OR
     REMEDIES UNDER OR RELATED TO THIS AGREEMENT OR ANY AMENDMENT, INSTRUMENT,
     DOCUMENT OR AGREEMENT DELIVERED OR THAT MAY IN THE FUTURE BE DELIVERED IN
     CONNECTION WITH THE FOREGOING, EACH PARTY HEREBY AGREES, TO THE EXTENT
     PERMITTED BY APPLICABLE LAW, THAT ANY SUCH ACTION OR PROCEEDING SHALL BE
     TRIED BEFORE A COURT AND NOT BEFORE A JURY AND EACH PARTY HEREBY WAIVES, TO
     THE EXTENT PERMITTED BY APPLICABLE LAW, ANY OBJECTION THAT IT MAY


                                       7
<PAGE>


     HAVE THAT EACH ACTION OR PROCEEDING HAS BEEN BROUGHT IN AN INCONVENIENT
     FORUM.


                                       8
<PAGE>


     IN WITNESS WHEREOF, the parties have duly executed this Guaranty Agreement
on the day and year first written above.



                                        GUARANTORS:

                                        US LEC of North Carolina L.L.C.
   
WITNESS:                                By: /s/ David N. Vail
                                           ------------------------------------
                                        Name: David N. Vail
                                              ---------------------------------
______________________                  Title: Executive Vice President, Finance
                                               Chief Financial Officer

______________________                  Address for Notices:

                                        US LEC of North Carolina L.L.C.
                                        212 S. Tryon Street, Suite 1540
                                        Charlotte, North Carolina  28281
                                        Telefacsimile: (704) 319-1345



                                       US LEC of Georgia L.L.C.

                                       By: /s/ David N. Vail
                                          ------------------------------------
                                       Name: David N. Vail
                                             ---------------------------------
                                       Title:  Executive Vice President, Finance
WITNESS:                                       Chief Financial Officer

______________________

______________________                   Address for Notices:

                                         US LEC of Georgia L.L.C.
                                        212 S. Tryon Street, Suite 1540
                                        Charlotte, North Carolina  28281
                                        Telefacsimile: (704) 319-1345



                                        LENDERS:

                                        /s/ Richard T. Aab
                                        ----------------------------------
                                        Richard T. Aab

                                        /s/ Tansukh V. Ganatra
                                        --------------------------------------
                                        Tansukh V. Ganatra


                                        Melrich Associates, L.P.

                                        By:  /s/ Richard T. Aab
                                             ----------------------------------
                                             Richard T. Aab, General Partner

    



                             CONTRIBUTION AGREEMENT


         THIS CONTRIBUTION AGREEMENT, is made and effective as of the 14th day
of February, 1998, between US LEC Corp., a Delaware corporation (the
"Corporation"), and Richard T. Aab, a resident of Pittsford, New York
("Contributor").

                                   BACKGROUND

         A. The Corporation currently owes Contributor the principal amount of
$5,000,000 pursuant to a promissory note dated January 16, 1998 (the "Debt").

         B. Contributor desires to convert the Debt to equity by contributing
the Debt to the Corporation in exchange for Class B Common Stock of the
Corporation at a conversion rate of approximately $10.40 per share, or 480,770
shares of the Class B Common Stock of the Corporation.

         C. The Corporation desires to accept the contribution to its capital
and to issue 480,770 shares of its Class B Common Stock to Contributor in
exchange for such contribution.

         Accordingly, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties agree as follows:

         Section 1. Contribution of Debt. Contributor hereby contributes the
entire principal amount of the Debt to the Corporation in exchange for the
issuance to him of an additional 480,770 shares of the Corporation's Class B
Common Stock. Contributor hereby agrees to deliver to the Corporation the
original promissory note representing the Debt marked "converted to equity".

         Section 2. Issuance of Stock. In consideration of the contribution to
the Corporation of the Debt, the Corporation hereby issues to Contributor
480,770 shares of the Corporation's Class B Common Stock and agrees to deliver
to Contributor a certificate representing such 480,770 shares as promptly as
practicable. The Corporation warrants and represents that such shares are
validly issued, fully paid and nonassessable and are free of all liens,
encumbrances and claims.

         Section 3. Effective Date. The contribution of the Debt to equity and
the issuance of the 480,770 shares shall be effective as of the date of this
Agreement, notwithstanding that the original promissory note and share
certificate may not be delivered until a later date.

         Section 4. Severability. Any provision of this Agreement which is
invalid, prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such invalidity, prohibition or
unenforceability without invalidating the remaining provisions hereof, and any
such invalidity, prohibition or unenforceability in any such jurisdiction shall
not invalidate or render unenforceable such provision in any other jurisdiction.

                                  Page 1 of 2
<PAGE>


         Section 5. Counterparts. This Agreement may be executed in any number
of counterparts and by the parties hereto on separate counterparts, but all of
such counterparts shall together constitute a single instrument. Any party may
execute and deliver this Agreement by telefax or other facsimile transmission.

         Section 6. Additional Actions. Each party hereto agrees to take (or
cause others to take) such other action and to execute and deliver (or cause
others to execute and deliver) such other agreements, certificates or documents
as may be reasonably necessary or desirable to carry out the provisions of this
Agreement.

         Section 7. Entire Agreement. This Agreement shall constitute the entire
agreement between the parties hereto with respect to the subject matter hereof
and shall not be supplemented, amended or modified except by a written
instrument executed on behalf of the parties hereto by such parties or their
duly authorized representatives and executed of even date herewith or subsequent
hereto.

         Section 8. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware, as they are
applied to contracts made and to be wholly performed in that state, regardless
of choice of law principles to the contrary.

         IN WITNESS WHEREOF, the parties have executed this Contribution
Agreement as of the day and year first written above.


                                  US LEC CORP.


                                   By: /s/ David N. Vail
                                      ------------------------------------
                                       Name: David N. Vail
                                             Executive Vice President, Finance
                                             Chief Financial Officer


                                   CONTRIBUTOR

                                      /s/ Richard T. Aab
                                     --------------------------------
                                     Richard T. Aab



                                  Page 2 of 2



                              AMENDED AND RESTATED
                             SHAREHOLDERS AGREEMENT

         THIS SHAREHOLDERS AGREEMENT (the "Agreement"), dated as of the 1st day
of January, 1998, is by and among RICHARD T. AAB, a resident of Pittsford, New
York ("Aab"), MELRICH ASSOCIATES, L.P., a New York limited partnership
("Melrich"), TANSUKH V. GANATRA, a resident of Charlotte, North Carolina
("Ganatra"), and SUPER STAR ASSOCIATES LIMITED PARTNERSHIP, a North Carolina
limited partnership ("Super STAR") (Aab, Melrich, Ganatra and Super STAR are
sometimes referred to individual as a "Shareholder", and sometimes referred to
collectively as the "Shareholders").

                                   BACKGROUND:

         A. US LEC Corp., a Delaware corporation (the "Corporation"), has
Seventeen Million Seventy-Five Thousand Two Hundred Seventy-Two (17,075,272)
shares of authorized Class B Common Stock, par value $.01 per share ("Class B
Common"), of which all but two of such shares are currently issued and
outstanding (as defined in Section 6, the "Shares").

         B. The Shareholders own and hold of record the following shares of
Class B Common:

             SHAREHOLDER                             NUMBER OF SHARES

         Richard T. Aab                                       8,721,770

         Melrich Associates, L.P.                             4,309,500

         Tansukh V. Ganatra                                     294,000

         Super STAR Associates
         Limited Partnership                                  3,750,000

         C. The Shareholders believe that it is in the best interests of the
Shareholders to make specific provisions concerning the disposition and
conversion of shares of Class B Common.

         D. The Shareholders believe it is in the best interests of the
Shareholders to make specific provisions concerning the voting of the shares of
Class B Common.

         Accordingly, in consideration of the premises and of the mutual
covenants and agreements contained herein, and for good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Shareholders do hereby agree as follows:

         1. Voting of the Class B Common Shares. Each Shareholder hereby agrees
that he, she or it will, for as long as he, she or it holds shares of Class B
Common, vote all of his, hers or its shares of Class B Common (whether now owned
or hereafter acquired), whether for directors or for any other purpose, in the
same manner as Aab. Each Shareholder further agrees to give his, hers or its
irrevocable proxy to Aab, contemporaneous with the execution any delivery of
this Agreement


<PAGE>


and hereafter from time to time at the request of Aab, by executing and
delivering to Aab an irrevocable proxy in the form of the proxy attached hereto
as Exhibit A. Aab agrees to vote the Shares to elect one (1) designee of Ganatra
and one (1) designee of Aab as directors of the Corporation.

         2. Offer Upon Elective Conversion. If any Shareholder desires to effect
an elective conversion of any shares of Class B Common (whether now owned or
hereafter acquired) into shares of Class A Common Stock of the Corporation
("Class A Common"), as provided for in the Certificate of Incorporation of the
Corporation, the Shareholder shall first submit to all other Shareholders a
written notice of the Shareholder's intent to convert his, her or its shares of
Class B Common into Class A Common, along with an offer to sell or exchange all
or part of the shares of Class B Common proposed to be converted, pursuant to
this Section 2 (the "Conversion Notice"). Each Conversion Notice shall
constitute dual, binding offers by the offering Shareholder to (A) sell all or
part of such shares of Class B Common for cash (the "Cash Offer") or (B)
exchange all or part of such shares of Class B Common for an equal number of
shares of Class A Common (the "Exchange Offer").

                  (a) The offered shares of Class B Common shall be allocated
         among the other Shareholders on the basis of the percentage of shares
         of Class B Common then owned by them (excluding shares of Class B
         Common owned by the offering Shareholder). Each offeree Shareholder
         shall have the right to purchase (by cash or exchange of shares of
         Class A Common) all or part of his, her or its allocated shares of the
         offered Shares.

                  (b) Within ten (10) days of delivery of the Conversion Notice,
         each offeree Shareholder shall provide written notice to the offering
         Shareholder and all other Shareholders of his, her or its election to
         consider acceptance of either the Cash Offer or the Exchange Offer and,
         if he, she or it intends to consider a Cash Offer, the expiration date
         for the six month period referred to in subsection (c)(ii) below (if
         applicable). An election by an offeree Shareholder to consider the Cash
         Offer shall automatically terminate the Exchange Offer to such
         Shareholder and an election by an offeree Shareholder to consider the
         Exchange Offer shall automatically terminate the Cash Offer to such
         Shareholder.

                  (c) For those offeree Shareholders electing to consider the
         Cash Offer (the "Cash Offerees"), the Cash Offer shall continue to be a
         binding offer of the offering Shareholder to sell until the later of,
         (i) the expiration of thirty (30) days after delivery of the Conversion
         Notice or (ii) 5:00 p.m. on the first business day subsequent to the
         expiration of the six month period following consummation, by any Cash
         Offeree, of any transaction treated as a nonexempt sale under Section
         16(b) of the Securities Exchange Act of 1934, as amended (the later of
         such times is referred to herein as the "Cash Offer Expiration Date").
         If any Cash Offeree does not purchase all of his, her or its allocated
         share of the offered shares of Class B Common on or before the Cash
         Offer Expiration Date, the offering Shareholder shall give written
         notice to the other Cash Offerees, and such other Cash Offerees shall
         have an additional ten (10) days from the delivery of such notice to
         elect to purchase such declined shares of Class B Common at the same
         price and upon the same terms previously offered to the declining Cash
         Offeree (and the Cash Offer shall continue to be a binding offer with
         respect to such declined shares until the expiration of such additional
         ten (10) day 

                                       2

<PAGE>



         period). Any such shares of Class B Common shall be allocated to the
         remaining Cash Offeree(s) on the basis of the percentage of shares of
         Class B Common owned by them (excluding shares of Class B Common owned
         by the offering Shareholder, the declining Cash Offeree(s), and the
         Exchange Offeree(s), as defined below).

                  (d) For those offeree Shareholders electing to consider the
         Exchange Offer (the "Exchange Offerees"), the Exchange Offer shall
         continue to be a binding offer of the offering Shareholder to exchange
         shares of Class B Common for an equal number of shares of Class A
         Common until the expiration of thirty (30) days after delivery of the
         Conversion Notice (the "Exchange Offer Expiration Date"). If any
         Exchange Offeree does not exchange all of his, her or its allocated
         share of the offered shares of Class B Common on or before the Exchange
         Offer Expiration Date, the offering Shareholder shall give written
         notice to the other Exchange Offerees, and such other Exchange Offerees
         shall have an additional ten (10) days from the delivery of such notice
         to elect to acquire such declined shares of Class B Common upon the
         same terms previously offered to the declining Exchange Offeree (and
         the Exchange Offer shall continue to be a binding offer with respect to
         such declined shares until the expiration of such additional ten (10)
         day period). Any such shares of Class B Common shall be allocated to
         the remaining Exchange Offeree(s) on the basis of the percentage of
         shares of Class B Common owned by them (excluding shares of Class B
         Common owned by the offering Shareholder, the declining Exchange
         Offeree(s), and the Cash Offeree(s)).

                  (e) Purchase Price Payable by Cash Offerees. The cash purchase
         price of each share of Class B Common for purposes of this Section 2
         shall be the average of the closing prices of a share of Class A Common
         for the ten (10) trading days immediately following the date on which
         Conversion Notice is given by the offering Shareholder, as reported in
         The Wall Street Journal or other reporting services acceptable to all
         parties hereto. If at the time the purchase price is to be determined,
         shares of the Class A Common are not publicly traded, the purchase
         price shall be determined as follows:



                                                        (8 x EBITDA)
                  Per Share Purchase Price  =  .75  x   ------------
                                                        (Total A&B)

                  Where EBITDA        =              The Corporation's
                                                     earnings before interest,
                                                     taxes, depreciation and
                                                     amortization as shown on,
                                                     for periods up to and
                                                     including December 31,
                                                     1999, the forecast for
                                                     calendar year 1999 in
                                                     existence at the time this
                                                     Agreement is signed, and
                                                     for all periods after
                                                     January 1, 2000, the most
                                                     recent consolidated year
                                                     end financial statements of
                                                     the Corporation.

                  and Total A&B =                    Total issued and
                                                     outstanding shares of the
                                                     Corporation's Class A
                                                     Common and Class B Common
                                                     at the time the purchase
                                                     price is determined.

                                       3

<PAGE>


                  (f) Terms of Purchase and Payment for Cash Offerees. If any
         Cash Offeree elects to purchase shares of Class B Common in accordance
         with this Section 2, the purchase must be consummated at the principal
         office of the Corporation in the State of North Carolina on the last
         day the Cash Offer remains binding (or at such other time and place as
         may otherwise be acceptable to the selling Shareholder and the
         purchasing Shareholder). Payment of the purchase price of the shares
         shall be made at closing by wire transfer of immediately available
         funds to an account designated by the selling Shareholder or by
         certified check payable to the selling Shareholder. Upon tender of the
         purchase price, the selling Shareholder shall deliver to the purchasing
         Shareholder one or more certificates representing all shares of Class B
         Common being purchased, duly endorsed over to the purchaser or
         accompanied by duly executed stock powers. The Shareholders shall cause
         the Corporation to cooperate with selling and purchasing Shareholders
         in connection with such offers and closing, including, but not limited
         to, providing appropriately denominated certificates on a timely basis.

                  If, pursuant to this Section 2, the Cash Offer Expiration Date
         occurs on a date which is subsequent to the thirtieth (30th) day
         subsequent to delivery of the Conversion Notice, then on the thirtieth
         day subsequent to delivery of the Conversion Notice, the Cash Offerees
         (other than those who have, prior to such date either purchased their
         allocated share of the offered shares of Class B Common or have
         notified the offering Shareholder of their decision not to purchase
         their allocated share of the offered shares of Class B Common) shall
         submit a non-refundable deposit (by wire transfer of immediately
         available funds to an account designated by the offering Shareholder or
         by certified check payable to the offering Shareholder) to the offering
         Shareholder in an amount equal to twenty-five percent (25%) of the
         purchase price of such Shareholder's share of offered shares of Class B
         Common (not previously purchased or declined). In the event that a Cash
         Offeree who has submitted a deposit does not purchase his, her or its
         allocated shares of the offered shares of Class B Common on or before
         the Cash Offer Expiration Date, his, her or its deposit shall be
         forfeited.

                  (g) Terms of Closing for Exchange Offerees. If any Exchange
         Offeree elects to accept the Exchange Offer in accordance with this
         Section 2, the exchange must be consummated at the principal office of
         the Corporation in the State of North Carolina on the last day on which
         the Exchange Offer remains binding (or at such other time or place as
         may otherwise be acceptable to the selling Shareholder and the
         purchasing Shareholder). At the closing, the accepting Exchange
         Offerees shall deliver to the selling Shareholder one or more
         certificates representing all shares of Class A Common being exchanged,
         duly endorsed over to the selling Shareholder or accompanied by duly
         executed stock powers, and the selling Shareholder shall deliver to the
         Exchange Offerees one or more certificates representing all shares of
         Class B Common being exchanged, duly endorsed over to the accepting
         Exchange Offerees or accompanied by duly executed stock powers. The
         Shareholders shall cause the Corporation to cooperate with the
         participating Shareholders in connection with such exchange and
         closing, including, but not limited to, providing appropriately
         denominated certificates on a timely basis.



                                       4
<PAGE>


         3. Transfer of Shares of Class B Common. The Shareholders hereby agree
that, unless all of the other Shareholders give their written consent thereto,
no Shareholder shall make a voluntary transfer or otherwise dispose of (as
defined in Section 6(c) herein) any of his, her or its shares of Class B Common,
whether now owned or hereafter acquired, to any party other than another
Shareholder, except that such shares of Class B Common may be transferred to a
Permitted Transferee (as defined in Article IV of the Restated Certificate of
Incorporation of the Corporation), but only if, simultaneous with the transfer
of such shares of Class B Common, such Permitted Transferee becomes a signatory
to this Agreement as a "Shareholder" (by executing and delivering to all other
Shareholders a signature page by which he, she or it agrees without condition to
be bound by this Agreement as a "Shareholder," and provides an address for the
giving of notices, and executes and delivers to Aab an irrevocable proxy in
favor of Aab as required by Section 1 of this Agreement.

         4.       Divorce or Legal Separation of a Shareholder.

                  (a) Notwithstanding anything herein to the contrary, if a
         spouse of a Shareholder has received shares of Class B Common as a
         Permitted Transferee (as defined in Article IV of the Restated
         Certificate of Incorporation of the Corporation) and such spouse is
         subsequently no longer legally married to or is legally separated from
         such Shareholder, then such Shareholder shall have an option to
         purchase any or all of such Shares (by cash payment or exchange). The
         option shall constitute a binding offer of the spouse to sell any or
         all of the Shares to the Shareholder at the same price per share and
         upon the same terms as is provided in Section 2 hereof, except that the
         cash purchase price shall be determined based on the closing prices of
         a share of Class A Common for the ten (10) trading days immediately
         following the date of the legal separation or divorce of such spouse
         and Shareholder and the option shall extend from the date of the
         divorce or legal separation until the applicable expiration date
         (excluding the additional ten day periods) provided in Section 2
         (calculated by using the date of the divorce or legal separation rather
         than the date of delivery of the Conversion Notice).

                  (b) If such Shareholder does not purchase all such Shares of
         his or her spouse pursuant to the option described in (a), then (i)
         such Shareholder shall give written notice (a "Divorce Notice") to all
         other Shareholders, and (ii) the other Shareholders shall have an
         option to acquire all or part of the declined Shares. This option shall
         constitute a binding offer of such spouse to sell all or part of the
         Shares to the other Shareholders at the same price per share and upon
         the same terms as provided in Section 2 hereof, except that the cash
         purchase price shall be determined based on the closing prices of a
         share of Class A Common for the ten (10) trading days immediately
         following the date of the legal separation or divorce of such spouse
         and Shareholder. The option shall confer upon each such other
         Shareholder the right to purchase (by cash payment or exchange) his,
         her or its allocated share of the declined Shares (allocated pro rata
         based on the Shares owned by all Shareholders other than the spouse and
         the declining Shareholder), and shall extend, with regard to each
         Shareholder, from the delivery of the Divorce Notice to such other
         Shareholder until the applicable expiration date (including but not
         limited to the additional ten day periods) provided in Section 2
         (calculated by using the date of the delivery of the Divorce Notice
         rather than the date of delivery of the Conversion Notice).


                                       5

<PAGE>

         5. Endorsement on Stock Certificate. The Shareholders shall use their
best efforts to cause each certificate representing shares of Class B Common at
any time owned by any Shareholder to bear the following legend prominently
displayed thereon:

                  "THE SHARES REPRESENTED BY THIS CERTIFICATE, AND THE TRANSFER
         HEREOF, ARE SUBJECT TO THE TERMS AND PROVISIONS OF THAT CERTAIN
         SHAREHOLDERS AGREEMENT DATED AS OF JANUARY 1, 1998, AS AMENDED FROM
         TIME TO TIME, A COPY OF WHICH IS MAY BE OBTAINED FROM ANY SHAREHOLDER
         OWNING SHARES OF CLASS B COMMON STOCK UPON REQUEST."

         6. Certain Interpretations and Definitions. As used in this Agreement:

                  (a) "Shareholder" or "Shareholders" means shareholders of the
         Corporation who are parties to this Agreement as provided on page 1
         hereof, and any successor in interest or transferee of any Shares of
         such Shareholder who purchased shares in accordance with this
         Agreement.

                  (b) "Shares" means any outstanding shares of Class B Common
         Stock of the Corporation now owned (as shown in the Recitals hereto) or
         hereafter acquired by any Shareholder, any shares distributed with
         respect to any such shares in a stock split, stock dividend or other
         recapitalization or reorganization, and any other outstanding shares of
         the Corporation that otherwise become subject to this Agreement by
         written agreement of the parties.

                  (c) The terms "transfer", "dispose of" and/or "disposition",
         when used with respect to shares, mean and include any sale,
         assignment, transfer, conveyance, gift, encumbrance, pledge,
         hypothecation, equitable distribution or other disposition of Shares
         (whether voluntary, involuntary, or otherwise), including permitting a
         levy or attachment on the Shares.

                  (d) An "involuntary" transfer or disposition of shares means
         (i) a testamentary or intestate transfer or disposition made incident
         to the death of a Shareholder, (ii) a transfer made in connection with
         the divorce or separation of a Shareholder pursuant to a property
         settlement agreement that is filed for public record, or (iii) a
         transfer made pursuant to an order issued by a court of competent
         jurisdiction in connection with the involuntary bankruptcy of, or the
         appointment of a receiver for, a Shareholder.

                  (e) A "voluntary" transfer or disposition of Shares refers to
         any transfer or disposition other than an involuntary transfer or
         disposition.

         7. Term. The term of this Agreement shall commence on the date hereof
and shall continue in effect for a period of ten (10) years. Thereafter, this
Agreement shall automatically renew for successive one (1) year terms all of the
Shareholders then holding Shares elect to terminate this Agreement as of the end
of the then current term (initial or renewal).


                                       6

<PAGE>



Notwithstanding the foregoing, Section 1 hereof shall be of no further force or
effect if at any time Aab ceases to own any Shares, and the last sentence of
Section 1 shall be of no further force or effect if at any time Ganatra ceases
to own any Shares.

         8. Notices. Any and all notices, consents, offers, acceptances or other
communications made hereunder must be in writing and shall be deemed given and
delivered when delivered personally or by courier service, provided evidence of
receipt is obtained, or three (3) days after mailing if mailed by registered or
certified mail, return receipt requested, postage prepaid, and addressed as
follows (or to such other address that the parties may from time to time
designate in a writing sent to all other parties of this Agreement in the manner
required by this Section 8, except that any such change of address notice shall
only be effective upon receipt):

                  (a)      if to Richard T. Aab:

                           29 Woodstone Rise
                           Pittsford, New York  14534

                  (b)      if to Melrich Associates L.P.:

                           29 Woodstone Rise
                           Pittsford, New York  14534

                  (c)      if to Tansukh V. Ganatra:

                           6523 Ashdale Place
                           Charlotte, North Carolina  28215

                  (d) if to Super STAR Associates Limited Partnership:

                           6523 Ashdale Place
                           Charlotte, North Carolina  28215

                  (e) A copy of any such correspondence shall also be sent to:

                           Moore & Van Allen, PLLC
                           100 North Tryon Street, Floor 47
                           Charlotte, North Carolina 28202-4003
                           Attention:  Aaron D. Cowell, Jr.

         9. Severability. If any such provision of this Agreement shall be
invalid or unenforceable for any reason, the other provisions shall continue to
be effective and binding and this Agreement shall be construed as if the invalid
or unenforceable provision were omitted. If any provision of this Agreement is
unenforceable after a certain period of years from the date hereof due to the
requirements of any state laws, the remainder of the Agreement shall remain
enforceable and binding in accordance with its terms.


                                       7

<PAGE>



         10. Binding Effect. This Agreement shall be binding upon the
Shareholders, and their respective heirs, legal representatives, executors,
administrators, successors and permitted assigns. Any rights given or duties
imposed upon the estate of a deceased Shareholder shall inure to the benefit of
and be binding upon the legal representative of such deceased Shareholder's
estate in his or her fiduciary capacity.

         11. Entire Agreement, Amendment, Waiver. This Agreement contains the
entire agreement of the parties hereto with respect to the subject matter
hereof, and supersedes any and all other agreements, either written or oral,
among the parties hereto regarding the same subject matter. The provisions of
this Agreement may be amended, modified or waived only as provided for herein or
on unanimous written consent of the Shareholders. A written waiver provided
pursuant to this Section 11 shall be effective only in the specific instance and
for the specific purpose for which given. No failure or delay on the part of any
Shareholder in the exercise of any right, power or privilege hereunder shall
operate as a waiver of any such right, power or privilege nor shall any such
failure or delay preclude any other or further exercise hereof.

         12. Counterparts. This Agreement may be executed in any number of
counterparts, each of which when so executed and delivered shall be deemed an
original, and it shall not be necessary in making proof of this Agreement to
produce or account for more than one such counterpart.

         13. Captions. The captions herein are inserted only as a matter of
convenience and for reference and in no way define, limit or describe the scope
of this Agreement nor any provisions hereof.

         14. Governing Law. This Agreement shall be governed by and construed
and interpreted in accordance with the laws of the State of Delaware.

         15.      Arbitration.

                  (a) Any dispute, controversy, difference or claim arising out
         of, relating to or in connection with this Agreement, any transaction
         hereunder, or the breach hereof shall be decided by arbitration in
         accordance with the Commercial Arbitration Rules of the American
         Arbitration Association then in effect, except as otherwise agreed by
         the parties. Any such arbitration shall be conducted on the earliest
         possible date and conducted in Charlotte, North Carolina. The arbiter's
         award shall be final and binding on the parties hereto and judgment
         upon the award may be entered in any court having jurisdiction thereof.
         Expenses in the arbitration shall be apportioned between the parties by
         the arbiter. The arbitration award may include reasonable attorneys'
         fees from the other party. No action, regardless of form, arising out
         of this Agreement may be brought more than three (3) years after the
         cause of action for such action has accrued.

                  (b) Notwithstanding subsection (a), either party may, if it
         believes that it requires or is entitled to injunctive relief, file a
         civil action in any court having jurisdiction seeking injunctive
         relief. Any claim or demand for monetary damages shall, however, be
         governed exclusively by the provisions for arbitration set forth in
         subsection (a).



                                       8

<PAGE>


         IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement under seal as of the date first above written.


                                     AAB


                                     ________________________________
                                     Richard T. Aab



                                     MELRICH ASSOCIATES, L.P.


                                     By:      ______________________________
                                                Richard T. Aab, General Partner


                                     GANATRA


                                     ---------------------------------------
                                     Tansukh V. Ganatra



                                     SUPER STAR ASSOCIATES
                                     LIMITED PARTNERSHIP


                                     By:
                                        -------------------------------------
                                         Tansukh V. Ganatra, General Partner


                                       9
<PAGE>


                                    EXHIBIT A
                                       to
                   AMENDED AND RESTATED SHAREHOLDERS AGREEMENT


                        APPOINTMENT OF IRREVOCABLE PROXY


         The undersigned shareholder of US LEC CORP., a Delaware corporation
(the "Corporation"), does hereby constitute and appoint RICHARD T. AAB ("Aab")
as its proxy with full power of substitution, for and on its behalf to attend
all meetings of shareholders of such Corporation and to act, vote and execute
consents with respect to all of its shares of Class B Common Stock of the
Corporation, as fully and to the same extent as the undersigned shareholder
might do itself. This proxy is irrevocable and is coupled with an interest,
having been executed in connection with that certain Amended and Restated
Shareholders Agreement dated as of January 1, 1998 to which Aab and the
undersigned are among the parties (the "Shareholders Agreement"). This
appointment of proxy shall continue in full force and effect as long as Aab and
the undersigned are parties to the Shareholders Agreement.

         This the ____ day of                        , 1998.
                              -----------------------



                                                     By:
                                                        ----------------------

                                                     Name:
                                                          --------------------




                                       10

   
                               RTA ASSOCIATES, LLC
                         2000 WINTON ROAD SOUTH, BLDG. 4
                               ROCHESTER, NY 14618

                              CONSULTING AGREEMENT

     This Agreement is made by and between RTA Associates, LLC, with an address
of 2000 Winton Road South, Rochester, New York 14618 ("Consultant") and US LEC
LLC ("USLEC"), a Delaware limited liability company with its principal offices
located at 212 South Tryon Street, Suite 1540, Charlotte, North Carolina 28281.

     1.   Retention as Consultant. USLEC hereby retains Consultant and
          Consultant hereby accepts such engagement and agrees to perform the
          services for USLEC as hereinafter set forth. During the Term hereof,
          Consultant shall act as a general business consultant to USLEC,
          particularly in the areas of strategic business analysis and planning,
          financial planning and capital formation, as well as in such other
          areas as may be assigned from time to time by USLEC's Chairman,
          President and/or Board of Directors. Consultant shall perform its
          duties in a diligent, effective, and loyal manner.

     2.   Compensation. Consultant shall be compensated by USLEC for all
          services to be rendered by it pursuant to this Agreement by the
          payment to it of consulting fees in the amount of $125,000.00 per
          year. In addition, USLEC shall reimburse Consultant for Consultant's
          reasonable out-of-pocket expenses incurred with respect to the
          performance of its consulting activities hereunder upon Consultant's
          presentation, within 30 days after incurring such expenses, of
          vouchers, receipts, and such other evidence of expenses incurred as
          shall be reasonably required by USLEC.

     3.   Term. The term of this Agreement shall be from January 1, 1997 through
          December 31, 1997, and shall automatically be renewed for successive
          one-year terms until terminated by one party giving the other at least
          30 days' advance notice of its intention to terminate this Agreement
          at the end of its then-current year.

     4.   Relationship. Consultant and USLEC are and shall be independent
          contractors in their relationship with each other and neither is nor
          shall be considered an agent, employee, or legal representative of the
          other for federal or state tax purposes or for any other purposes
          whatsoever. Consultant has no express or implied authority to assume
          or create any obligation or responsibility on behalf of USLEC or to
          bind USLEC in any way. Consultant agrees to indemnify, defend, and
          hold USLEC harmless from and against all claims, damages or
          liabilities as a result of its breach of this Paragraph. Consultant
          further acknowledges that as an independent contractor, it shall not
          be entitled to receive any insurance coverage


<PAGE>


          or other fringe benefits that USLEC customarily provides to its
          employees, except as may be specifically provided in this Agreement;
          and that no withholding, FICA or other taxes will be paid or withheld
          by USLEC on its behalf.

     5.   General Provisions.

          (a)  Binding Effect. This Agreement shall be binding upon and inure to
               the benefit of the parties hereto, their personal
               representatives, successors and assigns.

          (b)  Assignment. This Agreement may not be assigned, in whole or in
               part, by Consultant without the prior written consent of USLEC.

          (c)  Entire Agreement. This Agreement contains the entire
               understanding between or among the parties hereto and supersedes
               any prior understanding, memoranda or other written or oral
               agreements between or among any of them respecting the within
               subject matter.

          (d)  Modifications; Waiver. No modification or waiver of this
               Agreement or any party hereof shall be effective unless in
               writing and signed by the party or parties sought to be charged
               therewith. No waiver of any breach or condition of this Agreement
               shall be deemed to be a waiver of any other or subsequent breach
               or condition, whether of like or different nature. No waiver of
               any breach or condition of this Agreement by or with respect to
               any party hereto shall be deemed to be a waiver of the same
               breach or condition with respect to any other party hereto. No
               course of dealing between or among any of the parties hereto will
               be deemed effective to modify, amend or discharge any part of
               this Agreement or the rights or obligations of any party
               hereunder.

          (e)  Partial Invalidity. If any provision of this Agreement shall be
               held invalid or unenforceable by competent authority, such
               provision shall be construed so as to be limited or reduced to be
               enforceable to the maximum extent compatible with the law as it
               shall then appear. The total invalidity or unenforceability of
               any particular provision of this Agreement shall not affect the
               other provisions hereof and this Agreement shall be construed in
               all respects as if such invalid or unenforceable provision were
               omitted.

          (f)  Notices. Any notice or other communication required or permitted
               under this Agreement shall be in writing and shall be deemed to
               have been duly given (I) upon hand delivery, or (ii) on the third
               day following delivery to the U.S. Postal Service as certified or
               registered mail, return receipt requested and postage prepaid, or
               (iii) on the first day following delivery to a nationally
               recognized United States overnight courier service, fee prepaid,
               return receipt or other confirmation of delivery requested, or
               (iv) when telecopied or sent by facsimile transmission to the
               following fax numbers:


                                       2
<PAGE>


               If to USLEC: 704-319-1345 Attention: President

               If to Consultant: 716-424-5909, Attention: Richard T. Aab

               Any such notice or communication shall be delivered or directed
               to a party at its address or fax number set forth above or at
               such other address or fax number as may be designated by a party
               in a notice given to all other parties hereto in accordance with
               the provisions of this paragraph.

          (g)  Governing Law. This Agreement shall be governed by, and construed
               in accordance with, the laws of the State of New York pertaining
               to contracts made and to be wholly performed within such state,
               without taking into account conflicts of laws principles.

          (h)  Jurisdiction and Venue. In the event that any legal proceedings
               are commenced in any court with respect to any matter arising
               under this Agreement, the parties hereto specifically consent and
               agree that the courts of the State of New York and/or the United
               States Federal Courts located in the State of New York shall have
               exclusive jurisdiction over each of the parties hereto and over
               the subject matter of any such proceedings, and the venue of any
               such action shall be in Monroe County, New York and/or the United
               States District Court for the Western District of New York.

          (i)  Injunctive Relief. In the event of a breach or threatened breach
               of any of the terms of this Agreement, USLEC shall be entitled to
               an injunction restraining Consultant from committing any breach
               of this Agreement without showing or proving any actual damages
               and without diminishing any other right or remedy which USLEC may
               have at law or in equity to enforce the provisions of this
               Agreement.

          (j)  Expenses of Parties. In the event of a breach of this Agreement,
               the prevailing party(ies) in any resulting litigation shall be
               reimbursed its/their reasonable attorneys' fees and expenses
               incurred in such litigation by the party(ies) against whom
               judgment is rendered.

          (k)  Headings. The headings contained in this Agreement are inserted
               for convenience only and do not constitute a part of this
               Agreement.

          (l)  Fair Meaning. This Agreement shall be construed according its
               fair meaning, the language used shall be deemed the language
               chosen by the parties hereto to express their mutual intent, and
               no presumption or rule of strict construction will be applied
               against any party hereto.


                                       3
<PAGE>


          (m)  Gender. Whenever the context may require, any pronoun used herein
               shall include the corresponding masculine, feminine or neuter
               forms and the singular use of nouns, pronouns and verbs shall
               include the plural and vice versa.

          (n)  Counterparts. This Agreement may be executed in several
               counterparts, each of which shall be deemed an original, and all
               of said counterparts together shall constitute but one of the
               same instrument.


IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of
the 18th day of December, 1997


CONSULTANT:                             US LEC,LLC
RTA ASSOCIATES, LLC

By: /s/ Richard T. Aab          By: /s/ T.V. Ganatra
    -----------------------         --------------------
     Richard T. Aab, Member             Title: President & COO


January 1, 1998


RTA Associates LLC
Attn: R.T. Aab
2000 Winton Road South
Bldg. 4
Rochester, N.Y. 14618

RE: Consulting Agreement with US LEC

Dear Mr. Aab:


US LEC hereby notifies you that the consulting agreement between RTA Associates
LLC and US LEC dated December 18, 1997 is terminated for future years effective
January 1, 1998.


Sincerely,

/s/ Richard T. Aab
- ---------------------------
Richard T. Aab
Chairman & CEO

RTA:alc

I hereby agree to the termination of the agreement described above


RTA Associates LLC

By:  /s/ Richard T. Aab                                       1/4/98
     -------------------                                     --------
     Richard T. Aab, Manager                                   Date




                                       4

    


                           Super STAR Associates, L.P.
                               6523 Ashdale Place
                               Charlotte, NC 28215

                              CONSULTING AGREEMENT

     This Agreement is made by and between Super STAR Associates, L.P., with an
address of 6523 Ashdale Place, Charlotte, North Carolina 28215 ("Consultant")
and US LEC LLC ("USLEC"), a Delaware limited liability company with its
principal offices located at 212 South Tryon Street, Suite 1540, Charlotte,
North Carolina 28281.

1. Retention as Consultant. USLEC hereby retains Consultant and Consultant
hereby accepts such engagement and agrees to perform the services for USLEC as
hereinafter set forth. During the Term hereof, Consultant shall act as a general
business consultant to USLEC, particularly in the areas of operations expertise,
as well as in such other areas as may be assigned from time to time by USLEC's
Chairman, President and/or Board of Directors. Consultant shall perform its
duties in a diligent, effective, and loyal manner.

2. Compensation. Consultant shall be compensated by USLEC for all services to be
rendered by it pursuant to this Agreement by the payment to it of consulting
fees in the amount of $50,000.00 per year. In addition, USLEC shall reimburse
Consultant for Consultant's reasonable out-of-pocket expenses incurred with
respect to the performance of its consulting activities hereunder upon
Consultant's presentation, within 30 days after incurring such expenses, of
vouchers, receipts, and such other evidence of expenses incurred as shall be
reasonably required by USLEC.

3. Term. The term of this Agreement shall be from January 1, 1997 through
December 31, 1997, and shall automatically be renewed for successive one-year
terms until terminated by one party giving the other at least 30 days' advance
notice of its intention to terminate this Agreement at the end of its
then-current year.

4. Relationship. Consultant and USLEC are and shall be independent contractors
in their relationship with each other and neither is nor shall be considered an
agent, employee, or legal representative of the other for federal or state tax
purposes or for any other purposes whatsoever. Consultant has no express or
implied authority to assume or create any obligation or responsibility on behalf
of USLEC or to bind USLEC in any way. Consultant agrees to indemnify, defend,
and hold USLEC harmless from and against all claims, damages or liabilities as a
result of its breach of this Paragraph. Consultant further acknowledges that as
an independent contractor, it shall not be entitled to receive any insurance
coverage or other fringe benefits that USLEC customarily provides to its
employees, except as may be specifically provided in this Agreement; and that no
withholding, FICA or other taxes will be paid or withheld by USLEC on its
behalf.


<PAGE>


5.   General Provisions.

     (a)  Binding Effect. This Agreement shall be binding upon and inure to the
          benefit of the parties hereto, their personal representatives,
          successors and assigns.

     (b)  Assignment. This Agreement may not be assigned, in whole or in part,
          by Consultant without the prior written consent of USLEC.

     (c)  Entire Agreement. This Agreement contains the entire understanding
          between or among the parties hereto and supersedes any prior
          understanding, memoranda or other written or oral agreements between
          or among any of them respecting the within subject matter.

     (d)  Modifications, Waiver. No modification or waiver of this Agreement or
          any party hereof shall be effective unless in writing and signed by
          the party or parties sought to be charged therewith. No waiver of any
          breach or condition of this Agreement shall be deemed to be a waiver
          of any other or subsequent breach or condition, whether of like or
          different nature. No waiver of any breach or condition of this
          Agreement by or with respect to any party hereto shall be deemed to be
          a waiver of the same breach or condition with respect to any other
          party hereto. No course of dealing between or among any of the parties
          hereto will be deemed effective to modify, amend or discharge any part
          of this Agreement or the rights or obligations of any party hereunder.

     (e)  Partial Invalidity. If any provision of this Agreement shall be held
          invalid or unenforceable by competent authority, such provision shall
          be construed so as to be limited or reduced to be enforceable to the
          maximum extent compatible with the law as it shall then appear. The
          total invalidity or unenforceability of any particular provision of
          this Agreement shall not affect the other provisions hereof and this
          Agreement shall be construed in all respects as if such invalid or
          unenforceable provision were omitted.

     (f)  Notices. Any notice or other communication required or permitted under
          this Agreement shall be in writing and shall be deemed to have been
          duly given (i) upon hand delivery, or (ii) on the third day following
          delivery to the U.S. Postal Service as certified or registered mail,
          return receipt requested and postage prepaid, or (iii) on the first
          day following delivery to a nationally recognized United States
          overnight courier service, fee prepaid, return receipt or other
          confirmation of delivery requested, or (iv) when telecopied or sent by
          facsimile transmission to the following fax numbers:

          If to USLEC: 704-319-1345 Attention: Chairman

          If to Consultant: 704-535-7909, Attention: T. V. Ganatra


                                       2
<PAGE>


          Any such notice or communication shall be delivered or directed to a
          party at its address or fax number set forth above or at such other
          address or fax number as may be designated by a party in a notice
          given to all other parties hereto in accordance with the provisions of
          this paragraph.

     (g)  Governing Law. This Agreement shall be governed by, and construed in
          accordance with, the laws of the State of North Carolina pertaining to
          contracts made and to be wholly performed within such state, without
          taking into account conflicts of laws principles.

     (h)  Jurisdiction and Venue. In the event that any legal proceedings are
          commenced in any court with respect to any matter arising under this
          Agreement, the parties hereto specifically consent and agree that the
          courts of the State of North Carolina and/or the United States Federal
          Courts located in the State of North Carolina shall have exclusive
          jurisdiction over each of the parties hereto and over the subject
          matter of any such proceedings, and the venue of any such action shall
          be in Mecklenburg County, North Carolina and/or the United States
          District Court for the Western District of North Carolina.

     (i)  Injunctive Relief. In the event of a breach or threatened breach of
          any of the terms of this Agreement, USLEC shall be entitled to an
          injunction restraining Consultant from committing any breach of this
          Agreement without showing or proving any actual damages and without
          diminishing any other right or remedy which USLEC may have at law or
          in equity to enforce the provisions of this Agreement.

     (j)  Expenses of Parties. In the event of a breach of this Agreement, the
          prevailing party(ies) in any resulting litigation shall be reimbursed
          its/their reasonable attorneys' fees and expenses incurred in such
          litigation by the party(ies) against whom judgment is rendered.

     (k)  Headings. The headings contained in this Agreement are inserted for
          convenience only and do not constitute a part of this Agreement.

     (l)  Fair Meaning. This Agreement shall be construed according its fair
          meaning, the language used shall be deemed the language chosen by the
          parties hereto to express their mutual intent, and no presumption or
          rule of strict construction will be applied against any party hereto.

     (m)  Gender. Whenever the-context may require, any pronoun used herein
          shall include the corresponding masculine, feminine or neuter forms
          and the singular use of nouns, pronouns and verbs shall include the
          plural and vice versa.


                                       3
<PAGE>


     (n)  Counterparts. This Agreement may be executed in several counterparts,
          each of which shall be deemed, an original, and all of said
          counterparts together shall constitute but one of the same instrument.

     IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as
of the 18th day of December 1997.

CONSULTANT:                             US LEC, LLC

Super STAR Associates, L.P.
   
By:  /s/ T.V. Ganatra                  By:  /s/ Richard T. Aab
    ----------------------                 ------------------------------
     Tansukh V. Ganatra                 Title:  Chairman & CEO




January 1, 1998




Super STAR Associates, L.P.
Attn: T.V. Ganatra
6523 Ashdale Place
Charlotte, N.C. 28215

RE:  Consulting Agreement with US LEC

Dear Mr. Ganatra:

US LEC hereby notifies you that the consulting agreement between Super STAR
Associates, L.P. and US LEC dated December 18, 1997 is terminated for future
years effective January 1, 1998.


Sincerely,

/s/   Richard T. Aab
- -----------------------
Richard T. Aab
Chairman & CEO

RTA:alc

I hereby agree to the termination of the agreement described above.

Super STAR Associates, L.P.
by  /s/  T.V. Ganatra                           1/4/98
                                              ----------------
                                              Date






                                       4
    

   
                            US LEC CORP. SUBSIDIARIES


Name                                  Jurisdiction of Organization/Incorporation
- ----                                  ------------------------------------------
US LEC of North Carolina L.L.C.                   North Carolina

US LEC of Florida Inc.                            North Carolina

US LEC of Georgia Inc.                            Delaware

US LEC of South Carolina Inc.                     Delaware

US LEC of Tennessee L.L.C.                        Delaware

US LEC of Tennessee Inc.                          Delaware

US LEC of Virginia L.L.C.                         Virginia
    

<PAGE>

                                                                   EXHIBIT 23.1


                         INDEPENDENT AUDITORS' CONSENT


   
     We consent to the use in this Amendment No. 2 to Registration Statement
No. 333-46341 of US LEC Corp. of our report dated February 4, 1998 appearing in
the Prospectus, which is part of such Registration Statement and to the
reference to us under the headings "Summary Historical Consolidated Financial
and Operating Data," "Selected Historical Consolidated Financial and Operating
Data" and "Experts" in such Prospectus.




     DELOITTE & TOUCHE LLP

Charlotte, North Carolina
April 4, 1998
    


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