ICG COMMUNICATIONS INC
S-3, 1996-12-26
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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   As filed with the Securities and Exchange Commission on December 20, 1996
                                                         Registration No. 333-
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM S-3

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                            ICG COMMUNICATIONS, INC.
             (Exact name of registrant as specified in its charter)

                             9605 East Maroon Circle
                            Englewood, Colorado 80112
                                 303-572-5960
                  (Address, including zip code, and telephone
                 number, including area code, of Registrant's
                          Principal Executive Offices)

         Delaware                                          84-1342022
 (State of Incorporation)                               (I.R.S. Employer
                                                     Identification Number)
                                  Robin A. Roth
                      Vice President, Corporate Development
                            ICG Communications, Inc.
                             9605 East Maroon Circle
                            Englewood, Colorado 80112
                                 303-572-5960
              (Name, address, including zip code, and telephone
              number, including area code, of agent for service)
                                 with a copy to:
                               Leonard Gubar, Esq.
                                Reid & Priest LLP
                               40 West 57th Street
                            New York, New York 10019
                                (212) 603-2000

Approximate  date of  commencement  of proposed sale to the public:  Immediately
upon the effectiveness of this Registration Statement.

If the only securities  being registered on this Form are being offered pursuant
to dividend or interest reinvestment plans, please check the following box. |_|

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

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 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,
check the following box. |_|
<TABLE>

                         CALCULATION OF REGISTRATION FEE
<CAPTION>
<S>                 <C>            <C>            <C>            <C>                
- --------------------------------------------------------------------------------
                                                  Proposed    
                                    Proposed      Maximum        
                                    Maximum       Aggregate      Amount of
Title of Shares      Amount to be   Offering      Offering       Registration
to be Registered      Registered    Price (1)     Price(1)       Fee (1)(2)
- ---------------------------------------------------------------------------
Common Stock,        5,484,244      $18.57         $101,842,411   $30,861
$.01 par value
per share
===========================================================================
Total                5,484,244      $18.57         $101,842,411   $30,861
===========================================================================
<FN>

(1) Determined  pursuant to Rule 457(c) under the Securities Act of 1933,  based
upon the average of the high and low sales prices reported on December 12, 1996.

(2) This  Registration  Statement  carries  forward  5,484,244 of the 39,970,232
shares of Common  Stock  previously  registered  on 
<PAGE>

Form S-4  (Registration  No.333-4226),  for  which  an  aggregate  of  $248,355,
representing  the  registration  fee in  connection  with  the  registration  of
39,970,232 shares of Common Stock, has been paid.
</FN>
</TABLE>

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 Commission,  acting pursuant to said Section 8(a),
may determine.

Pursuant to Rule 429 of the Securities Act of 1933, the Prospectus filed as part
of this Registration Statement relates to Registration Statement No.
333-4226.





                      ICG COMMUNICATIONS,  INC.

                        CROSS REFERENCE SHEET

              Pursuant to Item 501(b) of Regulation S-K

 Item  S-K Item     Item                               Location in
                                                       Prospectus
     1 Item 501     Forepart of Registration
                    Statement and Outside Front        Cover Page
                    Cover Page of Prospectus

     2 Item 502     Inside Front and Outside Back      Inside Front and
                    Cover Pages of Prospectus          Outside Back Cover
                                                       Pages

     3 Item 503     Summary Information, Risk          Summary; Risk Factors
                    Factors and Ratio of Earnings
                    to Fixed Charges
    
     4 Item 504     Use of Proceeds                    Use of Proceeds
         
     5 Item 505     Determination of Offering          Plan of Distribution
                    Price

     6 Item 506     Dilution                           Not Applicable
         
     7 Item 507     Selling Security Holders           Selling Security
                                                       Holders

     8 Item 508     Plan of Distribution               Plan of Distribution
        
     9 Item 202     Description of Securities to       Description of
                    be Registered                      Common Stock
    
    10 Item 509     Interests of Named Experts         Experts; Legal
                    and Counsel                        Matters
    11              Material Changes                   Not Applicable
    
    12              Incorporation of Certain           Information
                    Information by Reference           Incorporated by
                                                       Reference; Available
                                                       Information
                                                       
    13 Item 510     Disclosure of Commission
                    Position on Indemnification        Not Applicable
                    for Securities Act Liabilities

                                       1
<PAGE>




                      ICG Communications, Inc.

                  5,484,244 Shares of Common Stock
                     $.01 Par Value Per Share



      This Prospectus  relates to (A) the resale (the "Offering") by the holders
named herein  ("Selling  Security  Holders") of up to 3,556,054 shares of Common
Stock,  $.01 par value per share (the  "Common  Stock")  of ICG  Communications,
Inc., a Delaware corporation ("ICG" or the "Company"),  representing (i) 250,000
shares of Common  Stock  issuable  upon the  exercise  of Series A Warrants  (as
defined herein);  (ii) 250,000 shares of Common Stock issuable upon the exercise
of Series B Warrants (as defined  herein);  (iii) 830,830 shares of Common Stock
which may be issued upon the  exchange  of an equal  number of shares of Class A
Common  Shares  (the  "Exchangeable  Shares")  of ICG  Holdings  (Canada),  Inc.
("Holdings-Canada");  (iv) 4,383 shares of Common Stock issuable upon conversion
(the "Conversion Shares") of 7% Convertible Subordinated Notes (the "7% Notes"),
including  1,231 shares of Common Stock which may be issuable in connection with
the  conversion  of the 7% Notes due to rounding;  (v) 202,933  shares of Common
Stock  issuable  upon the exercise of certain  warrants (the  "Warrants");  (vi)
2,000,000  shares of Common Stock issuable upon exercise of certain options (the
"Option  Shares");  and (vii) 17,908 shares of Common Stock issuable pursuant to
certain obligations under an acquisition agreement;  and (B) 1,928,190 shares of
Common  Stock  issuable  upon the  exercise  of certain  warrants  (the  "August
Warrants") issued in a private placement in August 1995. The authorized  capital
stock of ICG consists of 100,000,000  shares of Common Stock of which 30,953,330
shares  have been  issued and are  outstanding  as of  December  10,  1996,  and
1,000,000  shares of  preferred  stock,  $.01 par value,  of which no shares are
issued or are outstanding as of December 10, 1996.



      The Common Stock to be resold  hereby will be offered at market price into
the existing trading market for the Common Stock on or through the facilities of
a national securities exchange. The Common Stock is traded on the American Stock
Exchange under the symbol "ICG".  On December 16, 1996, the closing price of the
Common Stock on the  American  Stock  Exchange was $17.50 per share.  See "Price
Range of Common Stock."



      The Company will pay the expenses of  registration  and no underwriter has
been engaged for this  Offering.  The Company will not receive any proceeds from
the resale of the Common Stock by the Selling Security Holders.



      Investors  should  carefully  consider the information set forth under the
caption "Risk Factors," which begins on page 15.



      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.

          The date of this Prospectus is December  20, 1996

                                       2
<PAGE>



The  Selling  Security  Holders  intend to sell  their  shares  of Common  Stock
directly  through agents,  dealers,  or  underwriters,  in the  over-the-counter
market, or otherwise,  on terms and conditions determined at the time of sale by
the  Selling  Security  Holders or as a result of private  negotiations  between
buyer and seller. Expenses of any such sale will be borne by the parties as they
may agree.  Sales of the securities  may be made pursuant to this  Prospectus or
pursuant to Rule 144 adopted under the  Securities  Act of 1933, as amended (the
"Securities  Act").  No underwriting  arrangements  exist as of the date of this
Prospectus.  Upon being  advised of any  underwriting  arrangements  that may be
entered into by a Selling Security Holder after the date of this Prospectus, the
Company  will  prepare  a  supplement  to  this   Prospectus  to  disclose  such
arrangements. It is anticipated that the selling price per share of Common Stock
will be at, or between,  the "bid" and "asked" prices of the Company's shares of
Common Stock as reported on the American  Stock Exchange  immediately  preceding
the sale.



                                   THE COMPANY

      ICG Communications, Inc., a Delaware corporation ("ICG" or the "Company"),
has its  principal  executive  offices at 9605 East  Maroon  Circle,  Englewood,
Colorado 80112 and its telephone number is (303) 572-5960.



                              AVAILABLE INFORMATION

      The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange  Act"),  and in accordance  with
the  Exchange  Act  files  periodic  reports  and  other  information  with  the
Securities  and Exchange  Commission  (the  "Commission").  Such reports,  proxy
statements and other information filed by the Company with the Commission can be
inspected and copied (at prescribed rates) at the Commission's  Public Reference
Section,  Room 1024, Judiciary Plaza, 450 Fifth Street, N.W.,  Washington,  D.C.
20549, and at the Regional Offices of the Commission located at Citicorp Center,
500 West Madison Street,  Suite 1400,  Chicago,  Illinois 60661-2511 and 7 World
Trade Center,  13th Floor,  New York, New York 10048.  Such material may also be
accessed  electronically  by means of the Commission's home page on the Internet
at  http://www.sec.gov.   In  addition,  reports,  proxy  statements  and  other
information concerning the Company can be inspected and copied at the offices of
the American Stock Exchange, Inc., 86 Trinity Place, New York, New York 10006.

      The Company has filed with the Commission a registration statement on Form
S-3 (the "Registration  Statement") under the Securities Act with respect to the
securities  offered hereby.  This Prospectus,  which is part of the Registration
Statement,  does not contain all the information  set forth in the  Registration
Statement  and the exhibits and  schedules  thereto,  certain items of which are
omitted in accordance  with the rules and  regulations  of the  Commission.  For
further  information  with  respect to the  Company and the  securities  offered
hereby, reference is hereby made to the Registration Statement and such exhibits
and schedules. The Registration Statement,  including the exhibits and schedules
thereto,  may be inspected at, and copies  thereof may be obtained at prescribed
rates from, the public reference facilities of the Commission set forth above.

                                       3
<PAGE>



                      INFORMATION INCORPORATED BY REFERENCE

     1.   Annual  Report on Form 10-K (File No.1-1965) for the fiscal year ended
          September 30, 1996.
     2.   Form 8-A dated July 23, 1996.

      All  documents  subsequently  filed by the  Company  with  the  Commission
pursuant to Sections  13(a),  13(c),  14 or 15(d) of the Exchange Act, after the
date of this  Prospectus  and prior to the  termination  of the  Offering of the
shares of Common  Stock  made  hereby,  shall be  deemed to be  incorporated  by
reference into the Registration Statement of which this Prospectus is a part and
to be a part hereof from the date of such filing.  Any statement  contained in a
document  incorporated  or  deemed  to be  incorporated  by  reference  in  this
Prospectus  shall be deemed to be modified or  superseded  for  purposes of this
Prospectus  to the  extent  that a  statement  contained  herein or in any other
subsequently  filed  document which also is or is deemed to be  incorporated  by
reference  in  this  Prospectus  modifies  or  supersedes  such  statement.  Any
statement so modified or superseded  shall not be deemed,  except as so modified
or superseded, to constitute a part of this Prospectus.

      The Company hereby  undertakes to provide without charge to each person to
whom this Prospectus is delivered,  upon oral or written request of such person,
a copy of any and all information  that has been  incorporated by reference into
this Prospectus (not including  exhibits to the information unless such exhibits
are specifically incorporated by reference into such information).  Requests for
information should be addressed to: ICG  Communications,  Inc., 9605 East Maroon
Circle,  P.O. Box 6472,  Englewood,  Colorado  80155-6742,  Attention:  Investor
Relations (telephone number (800) 408-4253).

                                       4

<PAGE>



                                     SUMMARY

      The  following  summary is qualified in its entirety by the more  detailed
information appearing elsewhere in this Prospectus,  the consolidated  financial
statements of the Company and the notes  thereto,  and the other  financial data
contained elsewhere in this Prospectus,  as well as the information appearing in
the documents  incorporated by reference  herein.  Unless the context  otherwise
requires,  the term "Company" or "ICG" means the combined business operations of
ICG and its  subsidiaries;  the terms  "fiscal" and "fiscal year" refer to ICG's
fiscal year ending September 30; and all dollar amounts are in U.S. dollars. The
Company has elected to change its fiscal year end to December 31 from  September
30,  effective  January 1, 1997.  Industry  figures were  obtained  from reports
published by the Federal Communications  Commission ("FCC"), the U.S. Department
of Commerce,  Connecticut Research (an industry research organization) and other
industry  sources,  which the Company has not  independently  verified.  Certain
statements  contained in this Prospectus with respect to the Company's plans and
strategy for its business and related financing are  forward-looking  statements
(as such term is defined in the Private Securities  Litigation Reform Act). Such
statements  are  subject to risks and  uncertainties  and,  as a result,  actual
results  may  differ  materially  from  those  expressed  in or  implied by such
forward-looking statements.  Investors should carefully consider the information
set forth under the  caption  "Risk  Factors"  including  the risks  relating to
historical and anticipated operating losses and negative cash flow.


                             The Company

      The Company is one of the largest providers of competitive local telephone
services  in the  United  States,  based on  estimates  of the  industry's  1995
revenue.  Competitive local exchange carriers ("CLECs"),  formerly known as CAPs
(competitive access providers),  seek to provide an alternative to the incumbent
local  exchange  carriers  ("ILECs")  for a  full  range  of  telecommunications
services in the newly  opened  regulatory  environment.  As a CLEC,  the Company
operates  networks and has acquired  fiber optic  facilities  in three  regional
clusters covering major metropolitan statistical areas in California,  Colorado,
and the Ohio Valley, with an aggregate  population of 33.6 million, and in three
markets in the Southeast  region,  with an aggregate  population of 2.9 million.
The Company also provides a wide range of network systems  integration  services
and maritime and international  satellite  transmission  services.  As a leading
participant  in  a  rapidly  growing  industry,   the  Company  has  experienced
significant growth, with total revenues increasing from $29.5 million for fiscal
1993 to $169.1 million for fiscal 1996.

      In August  1996,  IntelCom  Group Inc.  ("IntelCom"),  a Canadian  federal
corporation,  received  final approval for its  reincorporation  into the United
States, pursuant to which its shareholders exchanged approximately 98 percent of
their Common Shares, no par value ("Common Shares"), on a one-for-one basis, for
shares of Common Stock of ICG, a Delaware corporation. IntelCom then changed its
name to  Holdings-Canada,  and  its  wholly  owned 
<PAGE>

subsidiary,  IntelCom Group(U.S.A.),  Inc., a Colorado corporation,  changed its
name to ICG  Holdings,  Inc.  ("ICG  Holdings").  Shareholders  who  elected  to
continue to hold  Common  Shares,  no par value,  of  Holdings-Canada  ("Class A
Common Shares") are entitled to exchange such shares at any time into ICG Common
Stock.  The  reincorporation  was designed to maintain the Company's  results of
operations,  existing  net  operating  losses  and asset  values of the  Company
without  causing  any  material  United  States or Canadian  federal  income tax
consequences to the Company. 

      The federal  Telecommunications Act of 1996 (the "Telecommunications Act")
and several  pro-competitive  regulatory  initiatives have substantially changed
the telecommunications regulatory environment in the United States. Due to these
regulatory  changes,  the Company is now permitted to offer all  interstate  and
intrastate  telephone  services,  including  local dial tone.  The Company began
offering  these  services in Orange  County,  California in September  1996, and
intends to begin offering local dial tone services in additional  markets in the
near future.  In order to take advantage of the switched  services  market,  the
Company  installed 14 high  capacity  digital  switches,  two of which are being
relocated,  and is installing  two  additional  digital  switches,  enabling the
Company to offer these  services  in all of its  markets.  ICG will  continue to
integrate advanced  switching  capabilities in its networks and plans to install
an additional 13 switches by the end of 1997. To facilitate the expansion of its
switched services  strategy,  in September 1996 the Company entered into a seven
year, $1.0 billion  agreement with Lucent  Technologies,  Inc.  ("Lucent") for a
full range of  switching  systems,  fiber,  network  electronics,  software  and
services.

Telecom Services

      The Company  operates  networks in the following  markets within its three
regional clusters: California (Sacramento, San Diego and the Los Angeles and San
Francisco metropolitan areas); Colorado (Denver,  Colorado Springs and Boulder);
and the Ohio Valley (Akron,  Cleveland,  Columbus,  Dayton and Louisville).  The
Company also  operates  networks in  Birmingham,  Charlotte and  Nashville.  The
Company also is developing networks in the Los Angeles metropolitan area through
its agreement with Southern California Edison Company ("SCE"), which the Company
entered  into  in  March  1996,  one  additional   city  in  the  San  Francisco
metropolitan area, and in Cincinnati and Greensboro/Winston-Salem. The Company's
operating  networks have grown from  approximately  168 fiber route miles at the
end of fiscal 1993 to approximately  2,143 fiber route miles as of September 30,
1996.  Telecom  Services revenue has increased from $4.8 million for fiscal 1993
to $87.7 million for fiscal 1996.

      Strategy

      The Company's objective is to become the dominant  alternative to the ILEC
in the markets it serves.  In  furtherance  of this  objective,  the Company has
developed  strategies  to capitalize  on its  established  customer base of long
distance  carriers  and to develop its markets  within  regional  clusters.  Key
elements of this strategy are:

                                       5
<PAGE>

      Aggressively Pursue Local and Statewide  Telephone Service.  The Company's
focus is to provide a wide range of telephone services.  With the passage of the
Telecommunications  Act,  competitive  opportunities  for new entrants  into the
local  telephone  services  market have  increased.  At the same time,  previous
restrictions on the ability of the Regional Bell Operating  Companies  ("RBOCs")
and GTE  Corporation  ("GTE"),  the  largest  ILECs,  to provide  long  distance
services have been  eliminated,  enabling the RBOCs and GTE to take advantage of
new  competitive  opportunities  and to  provide  a  wider  range  of  services,
including long distance  telephone  service.  It is likely that competition from
ILECs in the long distance  market will increase and as a result,  the Company's
long distance  carrier  customers are seeking ways to (i) increase their ability
to provide  local  telephone  services as a complement to existing long distance
service  offerings,  and (ii) reduce  their  reliance on the ILEC  networks.  By
offering an array of  telecommunications  products,  including  local  telephone
services and enhanced  services,  the Company will be providing a high  quality,
lower cost alternative to the ILEC. The Company initiated the provision of local
telephone  services in its Southern  California  markets in September  1996, and
will expand the  provision  of these  services to its other  markets in the near
future. As a result,  the Company expects local telephone services to become its
primary business.

      Market  Services to Carriers and End-Users.  The Company has  historically
marketed its services  primarily to long distance carriers and resellers and its
"first to market" advantage has enabled it to establish  relationships with such
carriers. As competition in the provision of local telephone services increases,
these  carriers are  attempting to expand their service  offerings by developing
and delivering local telephone  services and new enhanced products and services,
which the Company is able to provide its  carrier  customers  for resale by such
carriers.  This enables the Company to meet the  expanding  focus of its carrier
customers.  In  addition,  the Company is  expanding  its  marketing  efforts to
include  large  end-user  business  customers.  Management  believes  a targeted
end-user focus can accelerate its  penetration of the local services  market and
better leverage the Company's network investment.

      Concentrate Markets in Regional Clusters. The Company has concentrated its
networks in regional  clusters serving major  metropolitan  areas in California,
Colorado and the Ohio Valley.  The Company believes that by focusing on regional
clusters it will be able to more  effectively  service its customers'  needs and
efficiently  market,  operate  and  control its  networks.  The Company  also is
evaluating  the  expansion  of its  existing  clusters  and the  addition of new
regional  clusters in which it may seek to acquire  and/or build  facilities  to
provide local telephone services as well as access services.

      Expand  Alliances  with  Utilities.  The Company has  established,  and is
actively pursuing,  strategic alliances with utility companies to take advantage
of their existing fiber optic infrastructures. This approach affords the Company
the opportunity to license or lease fiber optic  facilities on a long-term basis
in a more timely,  cost-effective manner rather than constructing facilities. In
addition,  utilities  possess  conduit  and other  facilities  that may ease the
installation of fiber to extend the existing network in a given market. Finally,
the Company may take advantage of the utilities' name  recognition to market the
Company's products and services to the utilities' customer base.

                                       6
<PAGE>

Telecom Services Networks

      The  Company's  networks  are  composed of fiber optic  cables,  switching
facilities, advanced electronics,  transmission equipment and related wiring and
equipment.  The Company typically designs a ring architecture with a view toward
making the network accessible to the largest  concentration of telecommunication
intensive businesses in a given market.

      The Company's  networks are  configured in redundant  synchronous  optical
network ("SONET") rings that offer the advantage of uninterrupted service in the
event of a fiber cut or equipment failure. Additionally, much of the electronics
used by the Company in its networks have  redundant  components to limit outages
and increase network reliability.  The Company generally markets its services at
prices  below  those  charged by the ILEC.  Management  believes  these  factors
combine to create a more reliable and cost effective alternative to copper-based
networks which are still used, to some extent, by ILECs.

      The Company's networks are constructed to access long distance carriers as
well as areas  of  significant  end-user  telecommunications  traffic  in a cost
efficient manner. The construction period of a new network varies depending upon
the scope of the  activities,  such as the number of backbone  route miles to be
installed,  the initial  number of  buildings  targeted  for  connection  to the
network   backbone  and  the  general   deployment  of  the  network   backbone.
Construction is planned to allow revenue-generating operations to commence prior
to the completion of the entire network backbone.  When constructing and relying
principally on its own facilities, the Company has experienced a period of 12 to
18 months  from  initial  design of a network  to  revenue  generation  for such
network.  Based upon its  experience  (since the first  quarter of fiscal  1993)
with,  and strategy of, using leased  telephone  company  facilities  to provide
initial customer service,  the Company has experienced revenue generation within
nine months  after  commencing  network  design.  After  installing  the initial
network  backbone,  extensions to additional  buildings and  expansions to other
regions of a metropolitan area are evaluated,  based on detailed  assessments of
market  potential.  The  Company  is  currently  expanding  all of its  existing
networks to reduce its reliance on the ILECs and  evaluating  development of new
networks both inside and outside its existing regional clusters.

      The Company's network monitoring center in Denver operates and manages all
of the Company's  networks  from one central  location.  Centralized  electronic
monitoring  and control of the  Company's  networks  allows the Company to avoid
duplication  of  this  function  in  each  city,  thereby  reducing  costs.  The
monitoring  capabilities are supplemented  through a contract with an AT&T Corp.
("AT&T")  switch  control  center  in  Phoenix  for  surveillance  of all of the
Company's central office switches.
<PAGE>

      Switched services involve the transmission of voice, video or data to long
distance carrier-specified or end-user-specified  termination sites (by manually
or electronically  dialing a telephone number). By contrast,  the special access
services provided by the Company and other CLECs involve a fixed  communications
link or "pipe," usually between a specific end-user and a specific long distance
carrier's  point of  presence  ("POP").  With a switch  and  interconnection  to
various  carriers'  networks,  it is  possible  for the Company to direct a long
distance carrier's traffic to any end-user regardless of whether the end-user is
connected  to the  Company's  owned or leased  network,  to the local  telephone
company or to other CLEC networks.  In addition,  a switch gives the Company the
technological  capability to provide the full range of local telephone services,
including local dial tone. The Company began providing local telephone  services
to business  customers in the Orange County,  California area in September 1996.
The Company anticipates extending such services over the next 12 months in other
markets in the Los Angeles  metropolitan  area, San Diego, the San Francisco Bay
area and Sacramento,  as well as in the Company's  other markets  throughout the
U.S. The Company has regulatory authority to provide local telephone services in
California,  Colorado, Ohio, Tennessee, Alabama and Texas, and is in the process
of obtaining such authority in other jurisdictions.

      Services

      The Company's  competitive  local exchange  services include private line,
special access,  and interstate and intrastate  switched services and local dial
tone.  Private line services are generally  used to connect the separate  office
buildings  of a single  business.  Special  access  services are used to connect
end-user customers to a long distance telephone carrier's facilities, to connect
long distance  carrier's  facilities to the local  telephone  company's  central
offices,  and to connect different  facilities of the same long distance carrier
or  facilities  of  different  long  distance  carriers.  The  Company  requires
interconnection  with the local telephone  company's  central office in order to
offer this second alternative.  As part of its "carrier's carrier" strategy, the
Company targets the transport  between long distance company  facilities and the
local telephone company central offices, and, for high volume customers, between
the long distance company and the end-user customer's office.

      The Company's  interstate and  intrastate  switched  services  include the
transport and switching of calls between the long distance carrier's  facilities
and  either  the local  telephone  company  central  offices  or  end-users.  By
performing  the switching  services and most of the  transport,  the Company can
reduce local access costs, which constitute the major operating expense for long
distance  carriers.  As the  Company  provides  a greater  portion  of the local
segment of a call, the Company  expects to experience  improved  margins on what
has initially been a negative or low margin revenue stream.

      By offering switched services to its long distance carrier customers,  the
Company may be designated by a long  distance  carrier to deliver  incoming long
distance traffic to the Company's markets  regardless of whether the terminating
end-user is connected to the Company's  owned or leased  network or to the ILEC.
The  Company  intends  to expand  the  switched  services  it offers to its long
distance  carrier  customers  to include a broad range of higher  profit  margin
enhanced 

                                       7
<PAGE>

services,  such  as  enhanced  routing,  directory  assistance  and  information
services  including  800/888/900  numbers,  calling  cards and  personal  number
service,  as permitted by applicable  regulations.  Long distance carriers would
purchase  these  enhanced  services  from the Company and then market and resell
them, at a markup, to end-users.  By offering such services to its long distance
carrier  customers,  the Company would enable long  distance  carriers to sell a
broader  range of  services  to their long  distance  customers  and to generate
incremental revenue that previously could only be earned by ILECs. 

      Zycom. The Company owns a 70% interest in Zycom Corporation ("Zycom"),  an
Alberta,  Canada  corporation,  whose  shares  are traded on the  Alberta  Stock
Exchange.  Zycom  operates an  800/888/900  number service bureau and a switched
network in the United States  supplying  information  providers  and  commercial
accounts with audio, text and customer support services.

      SS7. In August 1996, the Company  acquired the Signaling  System 7 ("SS7")
business  of Pace  Network  Services,  Inc.,  a  division  of  Pace  Alternative
Communications,  Inc. The acquisition, which represents approximately 25% of the
SS7 operations of switch-based long distance carriers in the United States, will
enable the  Company to  strengthen  its sales and  marketing  efforts in the SS7
area.  The Company has also developed a nationwide SS7 service with Southern New
England  Telephone,  the nation's tenth largest local exchange  carrier.  SS7 is
used by local exchange companies, long distance carriers,  wireless carriers and
others to signal between network elements, creating faster call set-up resulting
in a more efficient use of network resources. SS7 is now the standard method for
telecommunications  signaling worldwide. SS7 is also the enabling technology for
Advanced Intelligence Network ("AIN") platforms, a set of services and signaling
options that carriers can use to create new services or customer options.

Network Services

      Through the Company's wholly owned subsidiary,  Fiber Optic  Technologies,
Inc. ("FOTI"), the Company supplies information technology services and selected
networking products, focusing on network design,  installation,  maintenance and
support for a variety of end-users, including Fortune 1000 firms and other large
businesses and telecommunications  companies.  Revenue from Network Services has
grown from $21.0 million for fiscal 1993 to $60.1 million for fiscal 1996.

      The  Company  provides  network   infrastructures,   systems  and  support
services,  including the design,  engineering and installation of local and wide
area networks  ("LANs/WANs") for its customers.  These networks (within end-user
offices,  buildings or campuses) may include fiber optic,  twisted pair, coaxial
and other  network  technologies.  The Company  specializes  in turnkey  network
installations   including   cabling  and  electronics   that  address   specific
environments.  The Company also provides  professional network support services.
These  services  include  network  move,  add and change  services  and on-going
maintenance  and  support  services.  Network  Services  revenue is  expected to
constitute a smaller portion of the Company's future revenue as Telecom Services
revenue increases.

                                       8
<PAGE>

      The Company offers these network  integration and support services through
offices located within four major regional support  organizations.  The regional
headquarters are located in Dallas, Denver, Portland (Oregon) and San Francisco.

Satellite Services

      The Company's  Satellite  Services  operations provide satellite voice and
data services to major cruise lines, the commercial  shipping industry,  yachts,
the U.S.  Navy and  offshore  oil  platforms.  The Company  also owns a teleport
facility which provides  international voice and data services. In addition, the
Company provides  private data networks  operating on VSATs (very small aperture
terminals) through its wholly owned subsidiary,  Nova-Net  Communications,  Inc.
("Nova-Net"). Revenue for the Satellite Services operations (adjusted to reflect
the sale of certain teleport assets) was $11.4 million for fiscal 1995 and $18.8
million for fiscal 1996.

      MTN.  In January  1995,  the  Company and an  unaffiliated  entity  formed
Maritime Telecommunication Network, Inc. ("MTN") which purchased the assets of a
business  providing digital wireless  communications  through  satellites to the
maritime cruise industry, U.S. Navy vessels and offshore oil platforms utilizing
experimental  radio  frequency  licenses  issued by the FCC. These licenses were
issued to the  predecessors  of MTN in 1991, were renewed by the FCC in 1993 and
renewed  again in  January  1995.  The  experimental  licenses  are valid  until
February  1,  1997,  and MTN may  apply to the FCC for a  further  renewal.  MTN
provides  private  communications  networks  to various  cruise  lines  allowing
passengers  to make calls  from  their  cabins to  anywhere  in the  world.  MTN
additionally   provides  its  communications   services  to  the  U.S.  Navy  in
conjunction  with a major  long  distance  provider,  which  serves  as the long
distance carrier,  while MTN provides the communications  equipment and network.
The Company believes that the radio frequencies  employed under its experimental
licenses  enable  it to  provide  a  higher  quality  maritime  service  than is
available  through the radio frequencies  currently  allocated to other maritime
service  providers.  In April 1996,  the FCC issued a waiver which allows MTN to
apply for a permanent FCC license to utilize the same  frequencies  as are being
used under the  experimental  license  enabling MTN to continue to provide these
services. The Company has applied for a permanent license under the terms of the
FCC's waiver grant, and the application is pending.

      MCN. In March 1996, the Company acquired a 90% equity interest in Maritime
Cellular  Tele-Network,  Inc. ("MCN"), a Florida-based  provider of cellular and
satellite  communications  for commercial ships,  private vessels and land-based
mobile  units.  This  acquisition  expands the  Company's  business  from C-band
satellite  services for cruise ships and naval vessels to cover land-based units
and smaller ships.

      Nova-Net.  In May 1994,  the Company  acquired  Nova-Net,  which  provides
private data networks  operating on VSATs specializing in data collection and in
monitoring  and control of customer  production and  transmission  facilities in
various  industries,  including  oil and gas,  
<PAGE>

electric and water utilities and environmental  monitoring industries.  Nova-Net
designs,  build and  manages  private  data  networks  that  enable a variety of
companies to transmit critical sensor and flow readings to key monitoring points
from multiple  locations.  Nova-Net manages networks through its network control
center in Englewood, Colorado. 

      Teleport.  The  teleport in Holmdel,  New Jersey,  acquired as part of the
Company's  acquisition  of  MTN,  is  located  20  miles  south  of  Newark  and
specializes in international digital voice and data communications services with
full fiber interconnection to the local telephone company facilities in New York
City.  Teleport services are also provided to the maritime  industry,  including
support of the  Company's  cruise  ship,  U.S.  Navy and  offshore  oil platform
telephone  and data  services  business.  In addition,  the Company  markets the
resale of  services  from the four  teleports  it sold in the first  quarter  of
fiscal 1996.


                                       10
<PAGE>


                            The Offering

Common Stock offered hereby....                   5,484,244 shares (1)
Common Stock outstanding after the Offering       36,437,574 shares (1)(2)
American Stock Exchange Symbol.                   ICG
Use of Proceeds................                   The  Company  will not receive
                                                  any of the  proceeds from this
                                                  Offering.


(1)  Assumes (i) the exercise of 2,631,123  warrants (2,631,123 shares of Common
     Stock),  (ii) the exercise of 2,000,000  stock options (of which  1,662,500
     are  currently  exercisable),  (iii) the  conversion of the 7% Notes (4,383
     shares of Common Stock); (iv) the exchange of 830,830 Class A Common Shares
     of  Holdings-Canada  for 830,830  shares of Common Stock of ICG and (v) the
     issuance of 4,383 shares of Common Stock upon the conversion of 7% Notes.
(2)  Does not  include  3,421,250  shares of Common  Stock  issuable pursuant to
     outstanding  stock options issued  pursuant to ICG's stock option plans (of
     which 1,329,299 are currently exercisable).



<PAGE>


    Summary Historical  Financial and Statistical  Information(1) 
    (In thousands, except Statistical Data and per share data)

   The Summary  Financial  Information  presented below as of and for the fiscal
years ended  September 30, 1994, 1995 and 1996 are derived from and qualified by
reference  to the  audited  consolidated  financial  statements  of the  Company
incorporated by reference herein.
<TABLE>
<CAPTION>


                                 Years Ended September 30,
                                -----------------------------
Statement of Operations Data:    1994      1995         1996
                                ---------  -------     ------

<S>                             <C>        <C>         <C>
 Revenue:
   Telecom services              14,854    32,330      87,681
   Network services              36,019    58,778      60,116
   Satellite services (1)         8,121    20,502      21,297
   Other                            118        -            -
                                ---------  -------   --------
      Total revenue              59,112   111,610     169,094

  Operating costs                38,165    78,846     135,253
  Selling, general and          
   administrative expenses       28,015    62,954      76,725
  Depreciation and amortization   8,198    16,624      30,368
                                --------- --------  ---------
                                 
    Total operating costs and    
    expenses                     74,378   158,424     242,346
                                --------- --------  ---------

  Operating loss                (15,266)  (46,814)    (73,252)
  Interest expense               (8,481)  (24,368)    (85,714)
  Other expense, net               (121)   (5,466)    (26,819)
                                --------- --------    --------

  Loss before income taxes and
  cumulative  effect            (23,868)  (76,648)   (185,785)
  of change in accounting
  Income tax benefit                  -        -        5,131
  Cumulative effect of change        
  in accounting (2)                 -        -         (3,453)
                                ---------  -------    --------

  Net loss                      (23,868)  (76,648)   (184,107)
                                =========  =======    ========

  Loss per share
                                  (1.56)    (3.25)      (6.83)
                                =========  =======    ========
  Weighted average number of
   shares outstanding (3)        15,342    23,604      26,955
                                =========  =======    ========

Other Data:

  EBITDA (4)                     (7,068)  (30,190)    (42,884)
  Capital expenditures (5)       54,921    88,495     175,148

Statistical Data (6) :
Telecom services:
  Buildings connected:
      On-net                        226       280         478
      Off-net                         -     1,095       1,589
                                ---------  -------  ---------
      Total buildings connected     226     1,375       2,067
  Customers circuits in         
  service (VGE's)               224,072   430,535     630,697
   Switched  minutes of use (in     
   millions)                          2       283       1,635
   Switches operational               1        13          14
   Fiber route miles (7)
      Operational                   323       627       2,143
      Under construction              -         -         869
   Fiber strand miles(8)  
      Operational                14,959    27,150      70,067
      Under construction              -         -      40,533
   Wireless miles(9)                606       568         491
Satellite services:
      VSATs                         810       626         835
      C-Band installations(10)        -        28          48
      L-Band installations(11)        -        -          109
      Maritime  minutes  of use       
      (in thousands) (12)             -       668       1,862
</TABLE>
                                       11
<PAGE>

<TABLE>
<CAPTION>

                                    At September 30,
                            ----------------------------------
Balance Sheet Data:           1994        1995        1996
                            ----------  ----------  ----------

<S>                         <C>         <C>         <C>

Working capital (deficit)    (8,563)    249,089     446,164
Total assets                201,991     583,553     939,351
Notes payable and current
  portion of long-           
  term debt and capital
  lease obligations          23,118      27,310       8,282
Long-term debt and capital
  lease obligations,        104,461     405,535     739,827
  less current portion
Redeemable preferred stock      
  of Holdings                    -       14,986     153,318
Stockholders' equity        
  (deficit)                 39,782       82,535     (19,588)
<FN>


(1)   Prior to  January  1995,  revenue  from  Satellite  Services  was from the
      Company's  satellite  (voice and data)  operations and after January 1995,
      revenue from Satellite  Services was from the Company's  satellite  (voice
      and data) and maritime communication operations.

(2)   During 1996,  the Company  changed its method of accounting  for long-term
      telecom services  contracts to recognize revenue as services are provided.
      As required by generally accepted accounting  principles,  the Company has
      reflected  the effects of the change in  accounting  as if such change had
      been  adopted as of October 1, 1995.  The  Company's  results for the year
      ended September 30, 1996 reflect a charge of $3.5 million  relating to the
      cumulative  effect of this change in accounting as of October 1, 1995. The
      effect  of  this  change  in  accounting  for  fiscal  year  1996  was not
      significant.  If the new  revenue  recognition  method  had  been  applied
      retroactively,  telecom  services  revenue  would have  decreased  by $0.5
      million and $0.7 million for fiscal 1994 and 1995, respectively.

(3)   Weighted  average number of shares  outstanding  for fiscal years 1994 and
      1995  represents  Holdings-Canada  Common  Shares  outstanding.   Weighted
      average  number  of  shares   outstanding   for  fiscal  1996   represents
      Holdings-Canada  Common Shares  outstanding for the period October 1, 1995
      through   August  2,  1996,   and   represents   ICG   Common   Stock  and
      Holdings-Canada Class A Common Shares (owned by third parties) outstanding
      for the period August 5, 1996 through September 30, 1996.

(4)   EBITDA  consists of operating  loss plus  depreciation  and  amortization.
      EBITDA  is  provided  because  it  is  a  measure  commonly  used  in  the
      telecommunications   industry.   EBITDA  is   presented   to   enhance  an

                                       12
<PAGE>

      understanding  of the Company's  operating  results and is not intended to
      represent cash flow or results of operations in accordance  with generally
      accepted accounting principles for the periods indicated.

(5)   Capital  expenditures  include  assets  acquired  under capital leases and
      through the issuance of debt or warrants.

(6)  Amounts  presented are for three-month  periods ended, or as of, the end of
     the period presented.

(7)   Fiber  route  miles  refers to the number of miles of fiber  optic  cable,
      including  leased fiber.  As of September 30, 1996,  the Company had 2,143
      fiber route miles, of which 165 fiber route miles were leased. Fiber route
      miles under  construction  represents  fiber under  construction and fiber
      which is expected to be operational within six months.

(8)   Fiber strand  miles  refers to the number of fiber route miles,  including
      leased fiber, along a telecommunications  path multiplied by the number of
      fiber strands  along that path. As of September 30, 1996,  the Company had
      70,067 fiber strand miles,  of which 2,465 fiber strand miles were leased.
      Fiber strand miles under construction  represents fiber under construction
      and fiber which is expected to be operational within six months.

(9)   Wireless  miles  represents  the total  distance of the digital  microwave
      paths  between  Company  transmitters  which  are  used  in the  Company's
      networks.

(10)  C-Band  installations  service cruise ships, navy vessels and offshore oil
      platform installations.

(11) L-Band  installations  service  smaller  maritime  installations,  and both
     mobile and fixed land-based units. 

(12) Reflects minutes of use for C-Band installations on cruise ships and, since
     the three  months  ended June 30, 1996,  also  includes  minutes of use for
     L-Band  installations.  Maritime  minutes  of use had  previously  included
     C-Band installations on navy vessels. However, due to changes in agreements
     with  certain of the navy  vessels,  the revenue has been  negotiated  at a
     fixed monthly rate and does not bear a direct  relationship  to the minutes
     of use.

</FN>
</TABLE>


                                       13
<PAGE>


                           RISK FACTORS

      An investment in the Common Stock offered hereby involves a high degree of
risk. The following risk factors,  together with the other information set forth
in this  Prospectus  and  appearing in the documents  incorporated  by reference
herein, should be considered when evaluating an investment in the Company.

     Historical and Anticipated Future Operating Losses and Negative Cash Flow.

      The Company  has  incurred  and  expects to continue to incur  significant
operating  and  net  losses.   In  fiscal  1996,  the  Company  had  revenue  of
approximately  $169.1 million, an operating loss of approximately $73.3 million,
interest expense of approximately  $85.7 million and a net loss of approximately
$184.1 million.  The Company expects to continue to generate  negative cash flow
from operating  activities  while it emphasizes  development,  construction  and
expansion of its telecom services  business and until the Company  establishes a
sufficient revenue generating  customer base. Because of the Company's expansion
strategy,  the Company's  operating loss, interest expense and net loss are each
expected  to  increase  over the near term.  In  addition,  the  Company  had an
accumulated deficit of approximately $318.8 million at September 30, 1996. There
can be no assurance  that the Company will achieve or sustain  profitability  in
the future.

Significant Capital Requirements

      The  Company's  current  plans for  expansion  of existing  networks,  the
development of new networks,  the further  development of the Company's products
and  services  and the  continued  funding  of  operating  losses  will  require
additional cash from outside sources. The Company's  arrangements with utilities
require  it to  make  significant  cash  payments  and  the  development  of the
Company's networks requires  significant  capital  expenditures for transmission
equipment,  switching facilities and network build out from the utilities' fiber
backbone to end-user locations.  Due to the number of opportunities arising from
changes in the  telecommunications  regulatory environment and the cash required
to take advantage of these  opportunities,  management believes that the cash on
hand and amounts expected to be available through vendor financing  arrangements
will provide  sufficient  funds  necessary for the Company to expand its Telecom
Services  business  as  currently  planned  and to fund its  operating  deficits
through 1997 and early 1998.  Additional  sources of cash may include public and
private  equity and debt  financings,  sales of  non-strategic  assets and other
financing arrangements. There can be no assurance that additional financing will
be available to the Company or, if  available,  that it can be obtained on terms
acceptable to the Company.  Failure to obtain such financing could result in the
delay or  abandonment of some or all of the Company's  acquisition,  development
and expansion plans and expenditures, which could have a material adverse effect
on its business prospects.

Risks Related to Switched Services Strategy

      
     The Company has installed 14 high capacity digital  switches,  two of which
     are being relocated, and is installing two additional digital switches that
     enable the Company to offer interstate and intrastate switched and enhanced
     services,  including local telephone services,  in all of its markets.  The
     Company  expects  to add 13  switches  by the  end of 1997  and  additional
     switches,  switching  capacity  and  network  capacity  as demand  warrants
     thereafter.  The Company began generating  switched access services revenue
     in  the  fourth  quarter  of  fiscal  1994.   Currently,   the  Company  is
     experiencing  negative  operating  margins  from the  provision of switched
     access services while its networks are in the development and  construction
     phases and while the  Company  relies on ILEC  networks  to  terminate  and
     originate a significant  portion of its customers'  switched  traffic.  The
     Company expects to realize improved  operating margins from switched access
     services  on a given  network  when (i)  increased  volumes of traffic  and
     build-out  enable such traffic to be carried on the  Company's  own network
     instead of ILEC  facilities,  and (ii) higher margin enhanced  services are
     provided to customers on the  Company's  network.  However,  the  Company's
     switched  services  strategy has not yet been profitable and may not become
     profitable  due  to,  among  other  factors,   lack  of  customer   demand,
     competition  from other  CLECs and  pricing  pressure  from the ILECs.  The
     Company   believes   that  the   unbundling   of  ILEC   services  and  the
     implementation of local telephone number portability, which are mandated by
     the Telecommunications Act, will facilitate the Company's plan to provide a
     full array of local  telephone  services.  In order to fully  implement its
     strategy, the Company must make significant capital expenditures to provide
     additional  switching  capacity,   network  infrastructure  and  electronic
     components.  The Company has limited experience providing such services and
     there can be no assurance that the Company will be successful.

                                       14
<PAGE>


Substantial Indebtedness

      As of  September  30,  1996,  the Company  had, on a  consolidated  basis,
aggregate   indebtedness,    including   capitalized   lease   obligations,   of
approximately  $748.1  million.  The accretion of original issue discount on the
Company's 13 1/2% Senior  Discount Notes and 12 1/2% Senior  Discount Notes will
cause an increase in  indebtedness  of  approximately  $475.2  million by May 1,
2001.  Management  believes  that the cash on hand and  amounts  expected  to be
available through vendor financing  arrangements  will provide  sufficient funds
necessary for the Company to expand its Telecom  Services  business as currently
planned  and to fund  its  operating  deficits  through  1997  and  early  1998.
Additional  sources  of cash may  include  public  and  private  equity and debt
financings,  sales of  non-strategic  assets and other  financing  arrangements.
Accordingly,  the Company will have to obtain a substantial amount of additional
cash.  There can be no  assurance  that the Company  will be able to obtain such
additional cash.

Certain Financial and Operating Restrictions

      The  terms  governing  certain  of  the  Company's  indebtedness  and  the
preferred  stock  of  ICG  Holdings,   ICG's  principal  U.S.   subsidiary  (the
"Exchangeable  Preferred  Stock"),  impose  significant  operating and financial
restrictions  on the Company.  Such  restrictions  affect,  and in certain cases
significantly limit or prohibit,  among other things, the ability of the Company
to incur additional  indebtedness or create liens on its assets,  pay dividends,
sell assets,  engage in mergers or

                                       15
<PAGE>

acquisitions  or make  investments.  Failure to comply with such covenants could
limit the availability of borrowings or result in a default thereunder, in which
case the lenders  will be able to  accelerate  the  maturity  of the  applicable
indebtedness.   Moreover,  the  instruments  governing  the  Company's  material
indebtedness contain cross-default provisions which provide that a default under
other  indebtedness  will be  considered  a default  under the  indebtedness  in
question.  In the event that a  cross-default  was  triggered,  the  maturity of
substantially all of the Company's  approximately $748.1 million of indebtedness
(at  September 30, 1996) would be  accelerated  and become  immediately  due and
payable. 

Risks Related to Rapid Expansion of Business

      The continued rapid  expansion and  development of the Company's  business
will depend on, among other things,  the Company's  ability to evaluate markets,
lease fiber from  utilities,  design fiber backbone  routes,  secure  financing,
install  facilities,  acquire  rights of way and  building  access,  obtain  any
required government authorizations, implement interconnection to and collocation
with facilities owned by ILECs and obtain appropriately priced unbundled network
elements from the ILECs,  all in a timely  manner,  at  reasonable  costs and on
satisfactory  terms and  conditions.  In addition,  such  expansion  may involve
acquisitions  which, if made,  could divert the resources and management time of
the Company and require  integration  with the Company's  existing  networks and
services.  The Company's ability to effectively  manage its rapid expansion will
require it to continue to implement  and improve its  operating,  financial  and
accounting  systems  and to  expand,  train and manage its  employee  base.  The
inability  to  effectively  manage its planned  expansion  could have a material
adverse  effect on the  Company's  business,  growth,  financial  condition  and
results of operations.

Competition

      The Company operates in an increasingly  competitive environment dominated
by  ILECs  such as the  Regional  Bell  Operating  Companies  ("RBOCs")  and GTE
Corporation ("GTE"). The Company's current competitors include RBOCs, GTE, other
CLECs,  network systems integration  service providers,  microwave and satellite
service providers,  wireless  telecommunications  providers and private networks
built  by  large  end-users.  Potential  competitors  include  cable  television
companies,  utilities and local telephone  companies outside their current local
service  areas,  as well  as the  local  service  operations  of  long  distance
carriers.  Consolidation of  telecommunications  companies,  including  recently
announced  proposed  mergers between certain of the RBOCs,  and the formation of
strategic  alliances  within  the  telecommunications  industry,  as well as the
development of new technologies,  could give rise to increased competition.  One
of the primary purposes of the Telecommunications Act is to promote competition,
in  particular  in  the  local   telephone   market.   Since  enactment  of  the
Telecommunications  Act,  several  telecommunications  companies  have indicated
their  intention  to  enter  many  areas  of  the  telecommunications  industry,
including  areas and  markets in which the Company  participates  and expects to
participate.  This may result in more participants,  including the Company, than
can ultimately be successful in a given market.

                                       16
<PAGE>

      As a recent entrant in the telecom services  industry,  the Company,  like
other  CLECs,  has not  achieved  a  significant  market  share.  The ILECs have
long-standing   relationships  with  their  customers,  have  the  potential  to
subsidize  services with revenue from a variety of businesses and have benefited
from certain state and federal  regulations  that,  until recently,  favored the
incumbent operator over potential competitors. The Telecommunications Act, other
recent  state  legislative  actions,  and current  federal and state  regulatory
initiatives provide increased business opportunities for the Company by removing
or substantially reducing barriers to local exchange competition. However, these
new competitive  opportunities are expected to be accompanied by new competitive
opportunities  for the ILECs,  as the  Telecommunications  Act removes  previous
restrictions on the provision of long distance services by the RBOCs and GTE. It
is also  expected  that  increased  local  competition  will result in increased
pricing  flexibility for, and relaxation of regulatory  oversight of, the ILECs.
If the ILECs are permitted to lower their rates,  engage in increased volume and
term discount pricing  practices or charge CLECs' increased fees for, or seek to
delay  implementation  of,  interconnection  to their  networks,  the  Company's
results of operations and financial condition could be adversely affected. There
can be no  assurance  that  the  Company  will be able to  achieve  or  maintain
adequate market share or revenue,  or compete effectively in any of its markets.
In addition, the success of the Company's strategy of leasing or licensing fiber
optic cable from utilities  depends upon the ability to connect end-users to the
Company's network.  Such connections require  significant capital  expenditures,
time and effort  and,  in some  cases,  end-users  targeted  by the  Company may
already be connected to another competitor.  There can be no assurance regarding
the number of end-users the Company will be able to connect to its network.

Regulation

      The  Company  operates  in an  industry  that  is  undergoing  substantial
regulatory  change as a result of the  passage  of the  Telecommunications  Act.
However, the Company continues to be subject to significant  federal,  state and
local  regulation.  On the federal level, the Company is not subject to price or
rate of return  regulation and is not required to obtain FCC  authorization  for
the  installation  or  operation  of  fiber  optic  network  facilities.   As  a
non-dominant  carrier, the Company must file tariffs for its interstate services
and  its  rates  must  be  reasonable  pursuant  to  authority  granted  in  the
Telecommunications  Act, however,  the FCC has indicated its intention to lessen
those regulatory  requirements for providers of competitive  telephone services.
In  addition,  the  FCC  may  have  the  authority,  which  it is not  presently
exercising,  to impose  restrictions  on  foreign  ownership  of  communications
services  providers not utilizing radio facilities.  The Company must obtain and
maintain certain FCC authorizations for its satellite and wireless services. The
Company  currently  provides  maritime  communication  services  pursuant  to an
experimental  license  that  expires  February 1, 1997.  In April 1996,  the FCC
issued a waiver to the Company which allows it to file an  application  with the
FCC for a permanent  license  that will allow the Company to continue to provide
these maritime communication services using the same frequencies currently being
used under the  experimental  license.  The  Company has applied for a permanent
license  under the terms of the  FCC's  waiver  order,  and the  application  is
pending. It is not known when the FCC will take final action on the application.
Although  the Company  expects  that the FCC will issue it a 

                                       17
<PAGE>

permanent  license,  there can be no  assurance  the  Company  will be granted a
permanent  license  or that the  experimental  license  currently  being used to
provide  maritime  communication  services  will be renewed for a further  term.

      State  regulatory  agencies  regulate  the  Company's  provision  of local
telephone services and other intrastate common carrier services. In general, the
Company is required  to obtain  certification  from the  relevant  state  public
utilities  commission prior to the initiation of intrastate  service and is also
required to file tariffs listing the rates,  terms, and conditions of intrastate
services provided.  In addition,  local authorities control the Company's access
to municipal  rights-of-way.  Any failure to maintain  proper  federal and state
tariffing or state certification,  or noncompliance with federal, state or local
laws or regulations, could have a material adverse effect on the Company.

      The   Telecommunications   Act   generally   requires   ILECs  to  provide
interconnection and nondiscriminatory  access to ILEC networks on more favorable
terms than have been available in the past. The Telecommunications Act imposes a
variety  of new  duties  on the  ILECs in order to  promote  competition  in the
markets for local exchange and access services,  including the duty to negotiate
in good faith with competitors  requesting  interconnection to the ILEC network.
However,  negotiations  with each ILEC may involve  considerable  delays and the
resulting  negotiated  agreements  may not  necessarily be obtained on terms and
conditions that are acceptable to the Company.  In such  instances,  the Company
may petition the proper state regulatory agency to arbitrate disputed issues. In
addition,  following state review either party in the negotiations can appeal to
the FCC.  There can be no  assurance  that the Company will be able to negotiate
acceptable  new   interconnection   agreements  or  that,  if  state  regulatory
authorities  impose terms and  conditions  on the parties in  arbitration,  such
terms will be  acceptable  to the  Company.  On August 8, 1996,  the FCC adopted
rules  and  policies  implementing  the  local  competition  provisions  of  the
Telecommunications   Act,  which  rules,  in  general,   are  favorable  to  new
competitive entrants. The FCC's rules have been challenged in the federal courts
of  appeals  by  the  RBOCs,  large  independent  ILECs,  and  state  regulatory
commissions.  On October  15,  1996,  the U.S.  Court of Appeals  for the Eighth
Circuit issued a stay of the implementation of certain of the FCC's rules, to be
in effect  until the Court  issues a decision on the merits of the FCC's  rules.
The Court has issued an expedited briefing  schedule,  and has indicated that it
will  issue a final  ruling  by  March  or  April  of  1997.  The  Court  stayed
implementation  of the pricing  provisions of the FCC's rules,  and of the "most
favored nation" rules,  which enable new entrants to "pick and choose"  elements
of established  interconnection agreements. The Court's stay does not affect the
implementation of the FCC's other interconnection rules, and does not affect the
statutory  requirements of the  Telecommunications  Act, including the statutory
requirements  that ILECs  conduct  negotiations  and enter into  interconnection
agreements with  competitive  carriers.  Although the Company  believes that the
Telecommunications  Act and other state and federal regulatory  initiatives that
favor increased competition are to the advantage of the Company, there can be no
assurance  that  changes  in current  or future  state or  federal  regulations,
including changes that may result from Court review of the FCC's interconnection
rules, or increased competitive  opportunities resulting from such changes, will
not have a material adverse effect on the Company.

                                       18
<PAGE>

Dependence on Key Customers

      The Company's five largest  customers  accounted for  approximately 28% of
the Company's  consolidated  revenue in fiscal 1996. The loss of, or decrease of
business  from,  one or more of these  customers  could have a material  adverse
effect on the  business,  financial  condition  and results of operations of the
Company. While the Company actively markets its products and services, there can
be no assurance that the Company will be able to attract new customers or retain
its existing customers.


Rapid Technological Change

      The  telecommunications  industry  is  subject  to rapid  and  significant
changes in technology.  The effect of technological  changes,  including changes
relating to emerging wireline and wireless transmission  technologies and on the
business of the Company can not be predicted.

Dependence on Rights of Way and Other Third Party Agreements

      The Company must obtain easements,  rights of way, franchises and licenses
from various private parties,  including actual and potential  competitors,  and
local governments in order to construct and maintain fiber optic networks. Under
the Telecommunications Act, municipalities may regulate use of their streets and
right-of-way,  but may not  prohibit  or  effectively  prohibit  any entity from
providing telecommunications services.  Additionally, the Telecommunications Act
requires that local governmental authorities treat  telecommunications  carriers
in a nondiscriminatory  manner.  There can be no assurance that the Company will
obtain  rights of way and  franchise  agreements  to expand its networks or that
these agreements will be on terms acceptable to the Company,  or that current or
potential  competitors  will not  obtain  similar  rights  of way and  franchise
agreements that will allow them to compete against the Company.  Because certain
of these  agreements are  short-term or are terminable at will,  there can be no
assurance  that the Company will  continue to have access to existing  rights of
way and franchises after the expiration of such agreements. An important element
of the Company's  strategy is to enter into long-term  agreements with utilities
to take  advantage of their  existing  facilities  and to license or lease their
excess  fiber  capacity.  The Company has entered  into  contracts  with several
utilities,  however  other CLECs are seeking to enter into similar  arrangements
and have bid and are  expected to continue to bid against the Company for future
licenses  or  leases.  Furthermore,  utilities  are  required  by state or local
regulators  to retain the right to  "reclaim"  fiber  licensed  or leased to the
Company if such fiber is needed for the utility's core business. There can be no
assurance that the Company will be able to obtain additional  licenses or leases
on  satisfactory  terms  or  that  such  arrangements  will  not be  subject  to
reclamation.  If a franchise,  license or lease agreement was terminated and the
Company was forced to remove or abandon a  significant  portion of its  network,
such termination could have a material adverse effect on the Company.

Key Personnel

                                       19
<PAGE>

      The efforts of a small number of key  management  and operating  personnel
will largely  determine the Company's  success.  The success of the Company also
depends in part upon its ability to hire and retain highly skilled and qualified
operating,  marketing,  financial and technical  personnel.  The competition for
qualified  personnel  in  the   telecommunications   industry  is  intense  and,
accordingly,  there can be no assurance that the Company will be able to hire or
retain  necessary  personnel.  The loss of certain key personnel could adversely
affect the Company and the price of the Common Stock. The Company has employment
agreements with J. Shelby Bryan, President and Chief Executive Officer,  Douglas
I. Falk,  Executive  Vice  President-Satellite  and  President of ICG  Satellite
Services,  Inc.,  James D. Grenfell,  Executive Vice President,  Chief Financial
Officer and Treasurer,  Mark S. Helwege,  Executive Vice  President-Network  and
President of Fiber Optic Technologies,  Inc., and William J. Maxwell,  Executive
Vice President-Telecom and President of ICG Telecom Group, Inc.

No Dividends

      The Company does not expect to generate net income in the near future and,
therefore,  does not anticipate paying cash dividends. The payment of any future
dividends  on the Common Stock is  effectively  prohibited  by the  restrictions
contained  in the  Company's  indentures  and in the First  Amended and Restated
Articles of  Incorporation  of ICG Holdings  which  prohibit  ICG Holdings  from
making any material payment to the Company.


Possible Stock Price Volatility

      The price of the Common  Stock has been,  and  following  the  Offering is
expected to continue to be, highly volatile.  See "Price Range of Common Stock."
Factors such as legislation or regulation,  variations in the Company's revenue,
earnings and cash flow, the difference  between the Company's actual results and
the results  expected by investors  and analysts,  announcements  of new service
offerings,   marketing  plans  or  price   reductions  by  the  Company  or  its
competitors,  technological innovations, and mergers or strategic alliances, are
expected  to cause the  price of Common  Stock to  fluctuate  substantially.  In
addition,  the stock markets  recently have  experienced  significant  price and
volume fluctuations that particularly have affected telecommunications companies
and growth  companies and resulted in changes in the market prices of the stocks
of  many  companies  that  have  not  been  directly  related  to the  operating
performance of those companies.

Shares Eligible for Future Sale

      As of December  10,  1996,  there were  30,953,330  outstanding  shares of
Common  Stock,  all of which are  transferable  without  restriction  or further
registration  under the  Securities  Act,  except for any shares of Common Stock
held by affiliates of ICG,  which will be subject to the resale  limitations  of
Rule 144 promulgated under the Securities Act ("Rule 144"). In addition, ICG has
reserved and registered under the Securities Act the following  9,878,678 shares
of Common  Stock for  future  issuance:  (i)  2,131,123  shares of Common  Stock
issuable pursuant to Holdings-Canada 

                                       20
<PAGE>

Anti-takeover Provision

      ICG's corporate charter provides that directors serve staggered three-year
terms and authorizes the issuance of up to 1,000,000  shares of preferred  stock
with such designations, rights and preferences as may be determined from time to
time by ICG's Board of Directors.  The staggered board  provision  increases the
likelihood  that, in the event of a takeover of ICG,  incumbent  directors would
retain their positions and,  consequently,  may have the effect of discouraging,
delaying  or   preventing  a  change  in  control  or  management  of  ICG.  The
authorization  of  preferred  shares  empowers the Board of  Directors,  without
further  stockholder   approval,   to  issue  preferred  shares  with  dividend,
liquidation, conversion, voting or other rights which could adversely affect the
voting power or other rights of the holders of the Common Stock. In the event of
issuance,  the preferred shares could be utilized,  under certain circumstances,
as a method of discouraging,  delaying or preventing a change of control of ICG.
In  addition,   the  Company  is  and  will  continue  to  be,  subject  to  the
anti-takeover  provisions of the Delaware  General  Corporation law, which could
have the effect of delaying or  preventing  a change of control of the  Company.
Furthermore,  upon a change of control,  the holders of substantially all of the
Company's  outstanding  indebtedness are entitled, at their option, to be repaid
in cash and the  holders  of the  Exchangeable  Preferred  Stock  may,  at their
option,  require  Holdings to redeem their shares for cash.  Such provisions may
have the effect of delaying or  preventing  changes in control or  management of
the Company.

                                       21
<PAGE>



                                 USE OF PROCEEDS

          The Company will not receive any proceeds from this Offering.


                           PRICE RANGE OF COMMON STOCK

      The Common Stock has been listed on the American Stock  Exchange  ("AMEX")
since August 5, 1996 under the symbol "ICG." Prior to that time, Holdings-Canada
Common  Shares had been listed on the AMEX under the symbol  "ITR" from  January
14, 1993  through  February  28,  1996,  and under the symbol  "ICG"  thereafter
through the close of trading on August 2, 1996.  Holdings-Canada  Common  Shares
ceased  trading  on the  AMEX  at the  close  of  trading  on  August  2,  1996.
Holdings-Canada Class A Common Shares are listed on the Vancouver Stock Exchange
("VSE") under the symbol "IHC.A."

      The following table sets forth, for the fiscal periods indicated, the high
and low sale prices of the Common Shares as reported on the AMEX through  August
2, 1996 and the VSE through the date indicated below, and the high and low sales
prices of the Common  Stock as reported on the AMEX from August 5, 1996  through
the date indicated  below. The table also sets forth the average of the monetary
exchange rates on the last day of each such fiscal period.

<TABLE>
<CAPTION>


                           American Stock    Vancouver Stock
                            Exchange (1)       Exchange (1)     Exchange
                           ---------------  ------------------- Rate 
                                                                            
                           High     Low      High       Low     (C$/$)
                           ------  -------  --------  --------- --------

<S>                        <C>     <C>      <C>       <C>        <C>
Fiscal Year Ended
September 30, 1995
  First Quarter           $17.88   $12.38   C$  33.50 C$  18.50  1.38
  Second Quarter           14.13     9.38       19.75     17.38  1.40
  Third Quarter            13.25     6.63       18.00     18.00  1.36
  Fourth Quarter           14.00     8.00         -          -   1.34

Fiscal Year Ended
September 30, 1996
  First Quarter           $12.75   $ 8.63   C$    -    C$    -   1.36
  Second Quarter           17.88    10.25         -          -   1.37
  Third Quarter            27.38    17.13         -          -   1.36
  Fourth Quarter           25.88    19.13         -          -   1.36

Fiscal Period Ended
December 31, 1996 (2)
  Through December  10,   
  1996                    $22.25   $17.63  C$ 28.35     $28.35   1.36                        
- ----------------

<FN>

(1)   Effective  at the close of trading  on August 2,  1996,  Holdings-Canada's
      Common  Shares ceased  trading on the AMEX and the Common Stock  commenced
      trading on the AMEX on August 5, 1996.  The Common  Stock is not traded on
      the VSE.  Holdings-Canada  Class A Common  Shares trade on the VSE and all
      information  reported  on the above  table from 

                                       22
<PAGE>

     August 5, 1996 to the date indicated  above with respect to the VSE relates
     only to the Class A Common  Shares. 

(2)  The  Company  has elected to change its fiscal year end to December 31 from
     September 30, effective for the 1997 fiscal year. 
</FN>
</TABLE>

                            SELLING SECURITY HOLDERS

      Certain Selling  Security Holders may sell their shares of Common Stock on
a delayed  or  continuous  basis.  This  Registration  Statement  has been filed
pursuant to Rule 415 under the Securities  Act to afford certain  holders of the
Company's outstanding shares of Common Stock the opportunity to sell such Common
Stock in  public  transactions  rather  than  pursuant  to  exemptions  from the
registration and prospectus delivery requirements of the Securities Act.

      The following  list of Selling  Security  Holders  indicates any position,
office,  or other  material  relationship  with  the  Company  that the  Selling
Security Holder had within the past three years,  the number of shares of Common
Stock owned by such Selling  Security Holder prior to the Offering,  the maximum
number of  shares  of  Common  Stock to be  offered  for such  Selling  Security
Holder's  account,  and the  amount  of the  class to be  owned by such  Selling
Security Holder after completion of the Offering  (assuming the Selling Security
Holder sold the maximum number of shares of Common Stock reflected  below).  The
Selling  Security  Holders are not required,  and may choose not, to sell any of
their shares of Common Stock.
<TABLE>
<CAPTION>


                                    Common Stock   Common      Common
Name                                  Prior to      Stock       Stock
                                      Offering      To be       After
                                                   Offered    Offering
- -------------------------------------------------------------------------
<S>                                 <C>            <C>                 <C> 
Acorn Partnership I, L.P.              18,705(1)      18,705           0
Acorn Partnership I, L.P.              18,705(2)      18,705           0
Amdur Children's Trust                     77(3)          77           0
Amdur Children's Trust                     78(4)          78           0
Applied Telecommunications             
  Technologies, Inc.                   35,208(5)      35,208           0
Applied Telecommunications             
  Technologies IV, Inc.                67,725(5)      67,725           0
Bear, Stearns Securities Corp.          9,605(3)       9,605           0
Bridgerope & Co.                        6,248(3)       6,248           0
J. Shelby Bryan (President, Chief
  Executive Officer and               
  Director of ICG)                  2,000,000(6)   2,000,000           0
Calhoun & CO.                             187(3)         187           0
CDS & Co.                              12,671(3)      12,671           0
CEDE & Co.                            744,654(3)     744,654           0
David Russin Pension Plan GO2496637        48(3)          48           0
David Russin Pension Plan GO2496637        49(4)          49           0
Larry DiGioia                           9,126(7)       9,126           0
Walter C. Doemel                        2,000(3)       2,000           0

<PAGE>

Florence Hecht Marital Trust               48(3)          48           0
Florence Hecht Marital Trust               49(4)          49           0
Fuelship & Co.                            534(3)         534           0
Howe & Co.                              1,489(3)       1,489           0
Magma Copper Co. Warburg Employee         
  Benefit Plan                            875(4)         875           0
Merrill Lynch & Company                   156(4)         156           0
Paine Webber Incorporated               3,580(3)       3,580           0
Paul Moore                            100,000(5)     100,000           0
Phillip Hempleman & Coleen             
  Hempleman                             1,945(4)       1,945           0
Pitt & Co.                              2,777(3)       2,777
Morgan Stanley Incorporated               486(3)         486           0
PGI Sweden AB                          18,518(1)      18,518           0
PGI Sweden AB                          18,518(2)      18,518           0
PGI Investments                        18,518(1)      18,518           0
PGI Investments                        18,518(2)      18,518           0
Princes Gate Investors, L.P.          184,999(1)     184,999           0
Princes Gate Investors, L.P.          184,999(2)     184,999           0
Richardson Greenshields of            
  Canada Ltd.                             400(3)         400           0
Salkeld & Co.                          20,999(3)      20,999           0
Sun Bank as Trustee for Jewish Cem
  EC85 A/C #53682-10-4                    543(3)         543           0
Sun Bank as Trustee for Jewish Cem
  Spcl Care A/C #53583-07-4             2,135(3)       2,135           0
Tamarack & Co.                          2,527(3)       2,527           0
Gregor von Opel                         9,260(1)       9,260           0
Gregor von Opel                         9,260(2)       9,260           0
Robert G. Werner                           40(3)          40           0
Whiting and Co.                        19,782(3)      19,782           0
Richard Williams                        8,782(7)       8,782           0
Miscellaneous Shares of Common 
  Stock                                 1,231(4)(8)    1,231           0

- ----------

<FN>

(1)  After exercise of outstanding Series A Warrants.

                                       23
<PAGE>

(2)  After exercise of outstanding Series B Warrants.
(3)  Upon exchange of Holdings-Canada Class A Common Shares for shares of Common
     Stock.
(4)  After conversion of 7% Notes. 
(5)  After exercise of outstanding Warrants.
(6)  After exercise of outstanding options.
(7)  Pursuant  to  certain  obligations  under the  DataCom  Integrated  Systems
     Corporation acquisition agreement.
(8)  Representing  shares of Common  Stock which may be  issuable in  connection
     with the conversion of the 7% Notes resulting from rounding upon conversion
     of the 7% Notes.

</FN>
</TABLE>



                          PLAN OF DISTRIBUTION

      The Common Stock  issuable (A) upon (i) exercise of the Series A Warrants,
the Series B Warrants,  the Warrant,  the August Warrants and the Option Shares;
(ii) the exchange of the  Exchangeable  Shares;  and (iii) the conversion of the
Conversion Shares; and (B) pursuant to an acquisition agreement, as the case may
be, will be issued directly by the Company to the  then-current  warrant holder,
option holder, holder of Class A Common Shares, holder of 7% Notes or parties to
the  acquisition  agreement  upon the  respective  exercise of such  warrants or
options,  or  exchange  or  conversion  of such  shares  or  issuance  under the
acquisition  agreement,  all of which is subject to the respective terms of such
warrants,  options,  Exchangeable  Shares,  Conversion  Shares  and  acquisition
agreement.

      Certain of the stockholders  listed under "Selling  Security Holders" have
informed  the Company  that they intend to sell shares of Common Stock that they
currently hold through  agents,  dealers or  underwriters  on the American Stock
Exchange  or  in  the  over-the-counter  market,  or  otherwise,  on  terms  and
conditions and at prices  determined at the time of sale by the Selling Security
Holders or as a result of private  negotiations  between buyer and seller. Sales
of shares of Common Stock may be made pursuant to this Prospectus or pursuant to
Rule 144 adopted under the Securities  Act of 1933, as amended (the  "Securities
Act").  Any sales  pursuant  to this  Prospectus  by holders of shares of Common
Stock will require the delivery of a current  Prospectus  to the  purchaser.  No
underwriting  arrangements  exist as of the date of this Prospectus for sales by
any  Selling   Security   Holders.   Upon  being  advised  of  any  underwriting
arrangements,  the Company will  supplement  this  Prospectus  to disclose  such
arrangements.  It is anticipated  that the per share selling price in the market
will be at or between the bid and asked  prices of the Common  Stock as reported
on the American Stock  Exchange.  Expenses of any such sale will be borne by the
parties as they may agree.




                           LEGAL MATTERS

      The legality of the Common Stock offered  hereby are being passed upon for
the Company by Reid & Priest LLP, New York, New York.


                               EXPERTS

      The consolidated  financial  statements of the Company as of September 30,
1995  and  1996,  and for  each of the  years  in the  three-year  period  ended
September  30,  1996,  have been  incorporated  by  reference  herein and in the
Registration  Statement of which this Prospectus is a part, in reliance upon the
report of KPMG Peat  Marwick  LLP,  independent  certified  public  accountants,
incorporated by reference herein, and upon the authority of said firm as experts
in accounting and auditing.



                                       24
<PAGE>

                                







No person has been authorized to give any 
information or to make any representations
other than those contained in this Prospe-
tusand, if given or made, such information 
or representations must not be relied upon           
as   having   been    authorized.    This                  
Prospectus  does not  constitute an offer             
to sell or the  solicitation  of an offer             5,484,244 SHARES
to buy  any  securities  other  than  the                    OF
securities  to  which it  related  or any               COMMON STOCK
offer to sell or the  solicitation  of an         $.01 par value per share   
offer  to  buy  such  securities  in  any
circumstances  in  which  such  offer  or
solicitation  is  unlawful.  Neither  the
delivery of this  Prospectus nor any sale
made   hereunder    shall,    under   any
circumstances,   create  any  implication
that  there  has  been no  change  in the
affairs  of the  Company  since  the date
hereof or that the information  contained
herein   is   correct   as  of  any  time
subsequent to its date.



                                TABLE OF CONTENTS



THE COMPANY.......................... 2
AVAILABLE INFORMATION................ 2
INFORMATION INCORPORATED BY REFERENCE 3
SUMMARY.............................. 4
RISK FACTORS........................ 16
USE OF PROCEEDS..................... 24     ICG COMMUNICATIONS, INC.
PRICE RANGE OF STOCK................ 24
SELLING SECURITIY HOLDERS........... 25
PLAN OF DISTRIBUTION................ 27            ----------
LEGAL MATTERS....................... 28            PROSPECTUS
EXPERTS............................. 28            ----------    





                                                    December , 1996


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





                                       25
<PAGE>




                               PART II

               INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution

   The  following  table  sets  forth the  expenses  payable  by the  Company in
connection  with  the  issuance  and   distribution  of  the  securities  to  be
registered.

      
      SEC Registration Fee                    $248,355*
      Accounting Fees and Expenses               2,500**
      Legal Fees and Expenses                   10,000**
      Miscellaneous                              5,000**
                                              ----------------
      Total
                                              $265,855
                                              ----------------
- -------------
      * Previously  paid in  connection  with the  registration  of
        39,970,232    shares   of   Common    Stock   on   Form   S-4
        (Registration Number 333-4226).
      ** Estimated.

Item 15. Indemnification of Directors and Officers

      The Company's Certificate of Incorporation  provides that the Company will
to the fullest extent  permitted by the General  Corporation Law of the State of
Delaware (the "GCL"),  as amended from time to time,  indemnify all persons whom
it may  indemnify  pursuant  thereto.  The Company's  By-laws  contain a similar
provision  requiring  indemnification of the Company's directors and officers to
the fullest  extent  authorized  by the GCL.  The GCL permits a  corporation  to
indemnify its directors and officers (among others) against expenses  (including
attorneys' fees),  judgments,  fines and amounts paid in settlement actually and
reasonably  incurred by them in connection  with any action,  suit or proceeding
brought (or  threatened to be brought) by third  parties,  if such  directors or
officers acted in good faith and in a manner they reasonably believe to be in or
not opposed to the best  interests of the  corporation  and, with respect to any
criminal action or proceeding,  had no reasonable cause to believe their conduct
was  unlawful.  In a  derivative  action,  i.e.,  one by or in the  right of the
corporation,  indemnification  may be made for  expenses  (including  attorneys'
fees) actually and  reasonably  incurred by directors and officers in connection
with the  defense or  settlement  of such action if they had acted in good faith
and in a manner  they  reasonably  believed  to be in or not opposed to the best
interests of the corporation,  except that no  indemnification  shall be made in
respect of any claim,  issue or matter as to which such  person  shall have been
adjudged liable to the corporation  unless and only to the extent that the Court
of  Chancery  or the  court in which  such  action  or suit  was  brought  shall
determine upon  application  that,  despite the adjudication of liability but in
view of all the  circumstances of the case, such person is fairly and reasonably
entitled to indemnity for such expenses.  The GCL further  provides that, to the
extent any director or officer has been successful on the merits or otherwise in
defense of any action, suit or proceeding  referred to in this paragraph,  or in
defense of any claim, issue or matter therein,  such person shall be indemnified
against expenses (including attorneys' fees) actually and reasonably incurred by
him  in  connection  therewith.   In  addition,  the  Company's  Certificate  of
Incorporation  contains a  provision  limiting  the  personal  liability  of the
Company's directors for monetary damages for certain breaches of their fiduciary
duty.  The Company has 
<PAGE>

indemnification insurance under which directors and officers are insured against
certain liability that may incur in their capacity as such.

      Item 16. Exhibits.

          (1)  Underwriting Agreement.
               
               Not Applicable.

          (2)  Plan of Acquisition, Reorganization,  Arrangement, Liquidation or
               Succession.

               2.1: Plan of Arrangement under Section 192 of the Canada Business
                    Corporations Act.  [Incorporated by reference to Exhibit 2.1
                    to Registration  Statement on Form S-4 (Commission  File No.
                    333-4226)].

          (4)  Instruments  Defining the Rights of Security  Holders,  Including
               Indenture.

               4.1: Memorandum of Articles for IntelCom Group Inc.,  Certificate
                    of Incorporation and copies of all Amendments thereto, filed
                    with the  Registrar of Companies for the Province of British
                    Columbia,  Canada  [Incorporated by reference to Exhibit (i)
                    to ICG Holdings  (Canada),  Inc.'s (formerly  IntelCom Group
                    Inc.) Form 20-F for the fiscal  year  ending  September  30,
                    1991]. 
               4.2: Note   Purchase   Agreement   dated   September   16,   1993
                    [Incorporated by reference to ICG Holdings (Canada),  Inc.'s
                    (formerly  IntelCom  Group Inc.) Annual  Report on Form 20-F
                    for the year ended September 30, 1993, as filed on September
                    30, 1994].
               4.3: Note Purchase Agreement dated October 27, 1993 [Incorporated
                    by  reference  to ICG Holdings  (Canada),  Inc.'s  (formerly
                    IntelCom Group Inc.) Annual Report on Form 20-F for the year
                    ended September 30, 1993, as filed on September 30, 1994].
               4.4: Form of Indenture  between  IntelCom  Group Inc. and Bankers
                    Trust  Company for 7%  Convertible  Subordinated  Redeemable
                    Notes due 1998  [Incorporated  by  reference to ICG Holdings
                    (Canada),  Inc.'s (formerly IntelCom Group Inc.) Exhibit 4.3
                    to Registration Statement on Form S-1, File No. 33-75636].
               4.5: Form of Indenture  between  IntelCom  Group Inc. and Bankers
                    Trust   Company   for   7%   Simple   Interest   Convertible
                    Subordinated  Redeemable  Notes  due 1998  [Incorporated  by
                    reference  to  ICG  Holdings   (Canada),   Inc.'s  (formerly
                    IntelCom Group Inc.) Exhibit 4.4 to  Registration  Statement
                    on Form S-1, File No. 33-75636].
               4.6: Note Purchase  Agreement,  dated as of July 14, 1995,  among
                    IntelCom Group Inc.,  IntelCom Group (U.S.A.),  Inc., Morgan
                    Stanley  Group Inc.,  Princes Gate  Investors,  L.P.,  Acorn
                    Partnership   I,  L.P.,   PGI   Investments   Limited,   PGI
                    Investments  Limited, PGI Sweden AB, and Gregor von Opel and
                    Morgan  Stanley  Group,  Inc.,  as Agent for the  Purchasers
                    [Incorporated by reference to ICG

                                       26
<PAGE>

                    Holdings  (Canada),  Inc.'s  (formerly  IntelCom Group Inc.)
                    Exhibit 4.1 to Form 8-K,  dated July 18, 1995]. 

               
               4.7: Warrant Agreement, dated as of July 14, 1995, among IntelCom
                    Group  Inc.,  the certain  purchasers,  and  IntelCom  Group
                    (U.S.A.),  Inc., as Warrant Agent [Incorporated by reference
                    to ICG Holdings  (Canada),  Inc.'s (formerly  IntelCom Group
                    Inc.) Exhibit 4.2 to Form 8-K, dated July 18, 1995].
               4.8: First Amended and Restated  Articles of Incorporation of ICG
                    Holdings,  Inc. [Incorporated by reference to Exhibit 3.1 to
                    ICG Communications,  Inc.'s  Registration  Statement on Form
                    S-4, File No. 333-04569].

          (5)  Opinion Regarding Legality.

               5.1: Opinion  of  Reid &  Priest  LLP as to the  legality  of the
                    securities offered hereby.

          (11  Statement re Computation of per Share Earnings.

               Not Applicable.

          (13) Annual Report to Security Holders.
            
               Not Applicable.

          (15) Letter re Unaudited Interim Financial Information.
               
               Not Applicable.

          (23) Consents of Experts and Counsel.
               
                 23.1: Consent of KPMG Peat Marwick LLP.
                 23.2: Consent of Reid & Priest LLP.

          (24) Power of Attorney.

               24.1: Power of Attorney appointing J.Shelby Bryan as attorney-in-
                     fact   (contained  on  the  signature  page  hereof).

          (25) Statement Re Eligibility of Trustee.

               Not Applicable.

          (26) Invitations For Competitive Bids.
          
               Not Applicable.

          (27) Financial Data Schedule.

                                       27
<PAGE>

               Not Applicable.


          (99) Additional Exhibits.
               
               Not Applicable.

Item 17.  Undertakings

   Rule 415 Offering. The undersigned registrant hereby undertakes:

   (1) To file,  during any period in which  offers or sales are being  made,  a
post-effective amendment to this Registration Statement:

          (a)  to include any  prospectus  required  by Section  10(a)(3) of the
               Securities Act of 1933;

          (b)  to reflect in the  prospectus  any facts or events  arising after
               the  effective  date of the  Registration  Statement (or the most
               recent post-effective  amendment thereof) which,  individually or
               in  the  aggregate,   represents  a  fundamental  change  in  the
               information set forth in the Registration  Statement;  and

          (c)  to include any material  information  with respect to the plan of
               distribution   not  previously   disclosed  in  the  Registration
               Statement  or any  material  change  to such  information  in the
               Registration Statement;

   (2) That, for the purpose of determining  any liability  under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof;

   (3) To remove from registration by means of a post-effective amendment any of
the securities  being  registered  which remain unsold at the termination of the
Offering.

   Filings  Incorporating  Subsequent  Exchange Act Documents by Reference.  The
undersigned   registrant  undertakes  that,  for  purposes  of  determining  any
liability  under the  Securities  Act of 1933,  each filing of the  registrant's
annual  report  pursuant  to Section  13(a) or Section  15(d) of the  Securities
Exchange Act of 1934 that is  incorporated  by  reference  in this  registration
statement  shall be deemed to be a new  registration  statement  relating to the
securities  offered  therein,  and the offering of such  securities at that time
shall be deemed to be the initial bona fide offering thereof.

   Incorporated  Annual  and  Quarterly  Reports.  The  undersigned   registrant
undertakes  to deliver or cause to be  delivered  with the  Prospectus,  to each
person to whom the  Prospectus  is sent or given,  the latest  annual  report to
security  holders  that is  incorporated  by  reference  in the  Prospectus  and
furnished  pursuant to and meeting the  requirements of Rule 14a-3 or Rule 14C-3
under  the  Securities  Exchange  Act of  1934;  and,  where  interim  financial
information  required to be presented

                                       28
<PAGE>

by Article 3 of Regulation S-X are not set forth in the Prospectus,  to deliver,
or cause to be delivered to each person to whom the Prospectus is sent or given,
the latest  quarterly  report that is specifically  incorporated by reference in
the Prospectus to provide such interim financial information.

   Request for Acceleration of Effective Date.  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
laws of  Canada,  the  Company's  Articles  of  Incorporation  and  By-laws,  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 Act 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  of 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.

                                       29
<PAGE>



                               SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements for filing Form S-3 and has duly caused this Registration Statement
to be signed on its behalf by the undersigned, thereunto duly authorized, in the
City of Englewood, State of Colorado on December 18, 1996.

                                    ICG Communications, Inc.

                                By:  /s/ J. Shelby Bryan
                                     ------------------------
                                      J. Shelby Bryan
                                      President, Chief Executive
                                      Officer and Director

     KNOW ALL MEN BY THESE PRESENTS,  that each person whose  signature  appears
below under the heading  "Signatures"  constitutes  and appoints J. Shelby Bryan
his true and lawful  attorney-in-fact  and agent with full power of substitution
and  re-substitution,  for him and in his name,  place and stead, in any and all
capacities, to sign any or all amendments (including post-effective  amendments)
to this Registration Statement, and to file the same, with all exhibits thereto,
and other  documents in connection  therewith,  with the Securities and Exchange
Commission,  granting  unto  said  attorney-in-fact  and  agent  full  power and
authority to do and perform each and every act and thing requisite and necessary
to be done in connection with the above  premises,  as fully for all intents and
purposes as he might or could do in person,  hereby ratifying and confirming all
that said  attorney-in-fact  and agent,  or his  substitute,  may lawfully do or
cause to be done by virtue hereof.

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated:

     Signatures          Title                              Date
                         Chairman   of  the  Board  of
/s/ William J. Laggett   Directors                          December 18, 1996
- -----------------------                     
William J. Laggett
                         President, Chief  Executive
                         Officer and Director 
/s/ J. Shelby Bryan      (Principal Executive Officer)       December 18, 1996
- -----------------------                                    
J. Shelby Bryan
                         Executive Vice President,
                         Chief Financial Officer and
                         Treasurer (Principal 
/s/ James D. Grenfell    Financial Officer)                 December 18, 1996
- -----------------------                                     
James D. Grenfell
                         Vice President and                          
                         Corporate Controller (Principal
/s/ Richard Bambach      Accounting Officer)                December 18, 1996
- -----------------------                             
Richard Bambach


/s/ William W. Becker    Director                           December 18, 1996
- -----------------------
William W. Becker

/s/ Harry R. Herbst      Director                           December 18, 1996
- -----------------------                               
Harry R. Herbst

                                       30
<PAGE>

/s/ Stan McLelland       Director                           December 18,1996
- -----------------------
Stan McLelland

/s/ Jay E. Ricks         Director                           December 18,1996
- -----------------------
Jay E. Ricks

/s/ Leontis Teryazos     Director                          December 18,1996
- -----------------------
Lentis Teryazos

                                       31
<PAGE>




 As filed with the Securities and Exchange Commission on December
                             __, 1996
                                        Registration No. 333-




                SECURITIES AND EXCHANGE COMMISSION
                      Washington, D.C. 20549

                  FORM S-3 REGISTRATION STATEMENT
                 UNDER THE SECURITIES ACT OF 1933







                     ICG COMMUNICATIONS, INC.


                             EXHIBITS


                                       32
<PAGE>


                     ICG COMMUNICATIONS, INC.
 Form S-3 Registration Statement under the Securities Act of 1933
                     (Registration No. 333- )



 (5)  Opinions Regarding Legality.

      5.1:  Opinion of Reid & Priest LLP.

(23)  Consents.

      23.1  Consent of KPMG Peat Marwick LLP.

     23.2 Consent  of  Reid &  Priest  LLP to the use of its  opinion  as to the
          legality of the securities offered hereby (contained in Exhibit 5.1).

(24)  Power of Attorney.

     24.1:Power of  Attorney  appointing  J.  Shelby  Bryan as  attorney-in-fact
          (contained on the signature page hereof).
          




                                       33
<PAGE>




                            ICG COMMUNICATIONS, INC.
        Form S-3 Registration Statement under the Securities Act of 1933
                            (Registration No. 333- )


                                  EXHIBIT 5.1









                            ICG COMMUNICATIONS, INC.
        Form S-3 Registration Statement under the Securities Act of 1933
                            (Registration No. 333- )

                                  EXHIBIT 23.1









                            

                                       34
                                     <PAGE>
                    

                            ICG COMMUNICATIONS, INC.
        Form S-3 Registration Statement under the Securities Act of 1933
                            (Registration No. 333- )




                                  EXHIBIT 23.2






<PAGE>

                                   EXHBIT 5.1


    New York, New York
                                          December 18, 1996


    ICG Communications, Inc.
    9605 E. Maroon Circle
    P.O. Box 6742
    Englewood, Colorado 80112-6742

      Re:  ICG Communications, Inc.;
           Registration Statement on Form S-3

    Ladies and Gentlemen:

           We have  acted as  counsel to ICG  Communications,  Inc.,  a Delaware
    corporation  (the  "Registrant"),  in connection  with the  preparation  and
    filing with the Securities and Exchange Commission (the "Commission") of the
    above-captioned  Registration  Statement  on  Form  S-3  (the  "Registration
    Statement")  under the  Securities  Act of 1933,  as  amended  (the  "Act"),
    relating  to  (i)  the  resale  by the  holders  named  therein  of up to an
    aggregate of 3,556,054 shares of Common Stock, $.01 par value per share (the
    "Common  Stock"),  of the  Registrant  issuable upon the exercise of certain
    warrants  and  options,   the  exchange  of  the  Exchangeable  Shares,  the
    conversion of the 7% Notes and in satisfaction of certain  obligations,  all
    as provided in the  Registration  Statement;  and (ii)  1,928,190  shares of
    Common  Stock  (such  shares,  together  with the  shares  of  Common  Stock
    described in clause (i) are collectively referred to herein as the "Shares")
    issuable upon the exercise of the August  Warrants  (capitalized  terms used
    herein and not  otherwise  defined  shall have the meanings set forth in the
    Registration Statement).

           In  connection  with the  proposed  offering,  we have  examined  the
    Certificate of Incorporation and the By-Laws of the Registrant,  resolutions
    of the Board of Directors of the Registrant and the Registration  Statement.
    We have also made such  inquiries  and have  examined  originals,  certified
    copies  or  copies  of other  instruments  as we have  deemed  necessary  or
    appropriate  for  the  purpose  of  this  opinion.   For  purposes  of  such
    examination,  we have assumed the  genuineness  of all signatures on and the
    authenticity  of  all  documents  submitted  to us  as  originals,  and  the
    conformity to the originals of all documents submitted to us as certified or
    photostatic copies.

           Based  upon  the  foregoing,  we are of the  opinion  that,  when the
    Registration  Statement  is declared  effective  under the Act, and when the
    Shares are issued upon (i) the exercise of the Series A Warrants, the Series
    B Warrants, the Warrants, the August Warrants and options in accordance with
    their respective terms and conditions and upon payment of the  consideration
    therefore as provided therein,  (ii) the exchange of the Exchangeable Shares
    in accordance with the terms and conditions of the agreement  governing such
    exchange,  (iii) the conversion of the 7% Notes in accordance with the terms
    and  conditions  of the  indenture  governing  the 7%  Notes,  and  (iv) the
    satisfaction  of  the  obligations  of  the  Registrant  pursuant  to and in
    accordance  with  the  terms  and  conditions  of that  certain  acquisition
    agreement,  the Shares  covered by the  Registration  Statement will be duly
    authorized,  validly issued, fully paid and non-assessable  shares of Common
    Stock of the Registrant.

           We hereby consent to the filing of this opinion as Exhibit 5.1 to the
    Registration  Statement and to the  reference  therein to our firm under the
    caption "Legal Matters." In giving the foregoing consent,  we do not thereby
    admit that we are in the category of persons whose consent is required under
    Section  7 of  the  Act or  the  rules  and  regulations  of the  Commission
    promulgated thereunder.

                                Very truly yours,


                                REID & PRIEST LLP


                                       1
<PAGE>


                         Consent of Independent Auditors



Board of Directors
ICG Communications, Inc.:

We consent to incorporation  by reference in the registration  statement on Form
S-3 of ICG Communications, Inc. of our reports dated November 18, 1996, relating
to the consolidated balance sheets of ICG Communications,  Inc. and subsidiaries
as of September 30, 1995 and 1996,  and the related  consolidated  statements of
operations, stockholders' equity (deficit), and cash flows for each of the years
in the three-year  period ended September 30, 1996,  which reports appear in the
September 30, 1996 Annual Report on Form 10-K of ICG Communications, Inc. and to
the  reference  to our firm  under the  heading  "Experts"  in the  registration
statement.

As explained in note 2 to the consolidated  financial statements,  during fiscal
1996,  the  Company  changed  its method of  accounting  for  long-term  telecom
services contracts.




                                    KPMG Peat Marwick LLP

Denver, Colorado
December 17, 1996






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