PSINET INC
S-8, 1999-12-01
COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
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        As filed with the Securities and Exchange Commission on December 1, 1999
                                                         Registration No.  333 -
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  _____________

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                                  _____________

                                   PSINet Inc.

             (Exact name of registrant as specified in its charter)

          New York                                                16-1353600
(State or other jurisdiction of                                (I.R.S. Employer
incorporation or organization)                               Identification No.)

510 Huntmar Park Drive, Herndon, Virginia                           20170
(Address of principal executive offices)                          (Zip Code)

                         1991 Employee Stock Option Plan
                         1994 Employee Stock Option Plan
                            (Full title of the plans)

                             Kathleen B. Horne, Esq.
                    Senior Vice President and General Counsel
                                   PSINet Inc.
                 510 Huntmar Park Drive, Herndon, Virginia 20170
                     (Name and address of agent for service)

                                 (703) 904-4100
          (Telephone number, including area code, of agent for service)
                          Facsimile No. (703) 375-1834
                                  _____________

                                    Copy to:
                           Richard F. Langan, Jr. Esq.
                                Nixon Peabody LLP
                  437 Madison Avenue, New York, New York 10022
           Telephone No.: (212) 940-3140/Facsimile No.: (212) 940-3111
                                  _____________

<TABLE>

- ---------------------------------------------------------------------------------------------------------------------
<CAPTION>

                                          CALCULATION OF REGISTRATION FEE
- -------------------------------- -------------------- -------------------- ---------------------- -------------------
                                                       Proposed maximum      Proposed maximum
      Title of securities           Amount to be        offering price      Aggregate offering        Amount of
       to be registered            registered (1)        per share (2)           price (2)         registration fee
- -------------------------------- -------------------- -------------------- ---------------------- -------------------
<S>                                <C>                <C>                  <C>                    <C>

Common Stock, $.01 par value       463,157 shares     $ 46.375             $21,478,905.87         $ 5,670.43
- -------------------------------- -------------------- -------------------- ---------------------- -------------------

</TABLE>


     (1) Represents (i) 12,001 shares issuable upon the exercise of options
granted under the 1991 Employee Stock Option Plan, (ii) 451,156 shares issuable
upon the exercise of options granted under the 1994 Employee Stock Option Plan,
and (iii) pursuant to Rule 416(a) of the Securities Act of 1933, such
indeterminate number of shares as may be issued by reason of any stock split,
stock dividend, recapitalization or similar transaction effected without the
receipt of consideration which results in an increase in the number of
outstanding shares of PSINet common stock.

     (2) Estimated in accordance with Rule-457(c) under the Securities Act of
1933 solely for the purpose of calculating the registration fee. The computation
is based upon the average of the high and low prices of our common stock as
reported on the Nasdaq Stock Market's National Market on November 22, 1999.

     Approximate date of commencement of the proposed issuance of the securities
to the public: from time to time after the registration statement becomes
effective.

<PAGE>

                                     PART I.

                  INFORMATION REQUIRED IN THE 10(a) PROSPECTUS


     On November 23, 1999, PSINet Inc. acquired Transaction Network Services,
Inc., also known by its former trading symbol, TNI. PSINet entered into a
definitive agreement to acquire TNI on August 22, 1999, as amended as of
October 14, 1999. According to the terms of the merger agreement, TNI was merged
into PSINet Shelf I Inc., a wholly owned subsidiary of PSINet, after the vote of
the shareholders of TNI approving the merger on November 23, 1999, and the name
of PSINet Shelf I Inc. was changed to "Transaction Network Services, Inc."

     This registration statement relates to the 1991 Employee Stock Option Plan,
as amended, and the 1994 Employee Stock Option Plan, as amended, which were
originally sponsored by TNI. Between 1991 and the present, TNI made grants to
its employees of options pursuant to the Plans, some of which remain
outstanding. TNI previously filed registration statements on Form S-8 covering
the shares of its common stock issuable pursuant to the Plans.

     Pursuant to the terms of the merger agreement, PSINet adopted sponsorship
of the Plans as of the time of the merger on November 23, 1999. At that time,
the options outstanding under the Plans were automatically modified such that
they now represent options to purchase shares of common stock, par value $.01
per share, of PSINet. Thus, the 12,001 options issued by TNI and outstanding
under the 1991 Employee Stock Option Plan are now options to acquire 12,001
shares of PSINet common stock and the 451,156 options issued by TNI and
outstanding under the 1994 Employee Stock Option Plan are now options to acquire
451,156 shares of PSINet common stock, in each case subject to certain
adjustments described in the Plans. This registration statement on Form S-8
relates to shares of PSINet common stock that may be issued upon the exercise of
currently outstanding options granted under the 1991 Stock Option Plan and 1994
Stock Option Plan. No further options will be issued under the Plans.

     The Plans provide for the grant of stock options to officers, directors and
key employees of TNI. Under the Plans, the Company may grant options that are
intended to qualify as incentive stock options ("ISOs") within the meaning
of Section 422 of the Internal Revenue Code of 1986, as amended (the"Code"), or
options not intended to qualify as incentive stock options ("Non-Qualified
Options"). The option price with respect to ISOs may not be less than 100% of
the fair market value of the underlying shares on the date of grant of the
option. However, in the case of an ISO granted to a person owning over 10% of
the common stock, the option price may not be less than 110% of such fair market
value. The option price of Non-Qualified Options may not be less than 50% of
such fair market value. The aggregate fair market value (determined at the time
of grant) of the common stock subject to ISOs granted to any one person which
first become exercisable in any calendar year may not exceed $100,000. ISOs are
exercisable over the exercise period specified in the applicable option
agreement, but in no event may such period exceed ten years from the date of
grant; provided, however, that in the case of an ISO granted to any person
owning over 10% of the common stock, the exercise period may not exceed five
years from the date of grant. Non-Qualified Options are exercisable over a
period of up to eleven years from the date of grant. Options granted under the
Plans are generally nontransferable and, with certain exceptions in the event of
the death or disability of the optionee, options granted under the Plans
generally terminate thirty days after termination of an optionee's employment
with the company or an affiliate. The 1991 Employee Stock Option Plan, as
amended, and the 1994 Employee Stock Option Plan and its amendments are exhibits
to this registration statement and should be read in connection herewith.

     Additional information required to be contained in the Section 10(a)
prospectus is omitted from the registration statement in accordance with Rule
428 of the Securities and Exchange Commission issued unde the Securities Act of
1933, as amended and the Note to Part I of Form S-8.

<PAGE>
                                    PART II.

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.  Incorporation of Documents by Reference.

      The following documents that have been filed by PSINet with the Securities
and Exchange Commission are incorporated herein by reference:

      1.  Our annual report on Form 10-K for the fiscal year ended December 31,
1998. This report contains:

             * audited consolidated balance sheets for PSINet and its
               subsidiaries as of December 31, 1998 and 1997

             * related audited consolidated statements of operations, of changes
               in shareholders' equity and of cash flows for the years ended
               December 31, 1998, 1997 and 1996

      2.  Our quarterly reports on Form 10-Q for the quarters ended:

             * March 31, 1999

             * June 30, 1999

             * September 30, 1999

      3.  Our current reports on Form 8-K dated:

             * July 31, 1997 (solely insofar as it relates to our Shareholder
               Rights Agreement dated May 8, 1996, as amended)

             * August 20, 1997

             * April 27, 1999

             * May 7, 1999

             * July 6, 1999

             * July 16, 1999

             * August 22, 1999

             * August 22, 1999

             * November 5, 1999

             * November 17, 1999

     4. Our registration statement on Form 8-A dated April 7, 1995, as amended
(registration no. 0-25812)

<PAGE>

     5. Our registration statement on Form 8-A dated June 4, 1996, as amended
(registration no. 0-25812)

     We are also incorporating by reference in this registration statement all
reports and other documentsthat it files pursuant to Sections 13(a), 13(c), 14
or 15(d) of the Securities Exchange Act of 1934 subsequent to the date of this
registration statement and prior to the filing of a post-effective amendment
which indicates that all securities offered hereby have been sold or which
deregisters all securities remaining. These reports and documents will be
incorporated by reference in and considered to be a part of this registration
statement as of the date of filing of such reports and documents.

     Any statement contained in this registration statement or in a document
which is incorporated by reference herein will be modified or superseded for
purposes of this registration statement to the extent that a statement in any
document that we file after the date of this registration statement that also is
incorporated by reference herein modifies or supersedes such prior statement.
Any such statement so modified or superseded willnot, except as so modified or
superseded, constitute a part of this registration statement.

ITEM 4.  Description of Securities.

       Not applicable.

ITEM 5.  Interests of Named Experts and Counsel.

       Not applicable.

ITEM 6.  Indemnification of Officers and Directors.

     The New York Business Corporation Law (the "BCL") provides that if a
derivative action is brought against an officer or director of a corporation,
the corporation may indemnify him or her against amounts paid in settlement and
reasonable expenses, including attorneys fees, incurred by him or her, in
connection with the defense or settlement of such action, if such officer or
director acted in good faith for a purpose which he or she reasonably believed
to be in the best interests of the corporation, except that no indemnification
shall be made without court approval in respect of a threatened action, or a
pending action settled or otherwise disposed of, or in respect of any matter as
to which such officer or director has been found liable to the corporation. In a
nonderivative action or threatened action, the BCL provides that a corporation
may indemnify an officer or director against judgments, fines, amounts paid in
settlement and reasonable expenses, including attorneys' fees, incurred by him
or her in defending such action if such officer or director acted in good faith
for a purpose which he or she reasonably believed to be in the best interests of
the corporation.

     Under the BCL, an officer or director who is successful, either in a
derivative or nonderivative action, is entitled to indemnification as outlined
above. Under any other circumstances, such officer or director may be
indemnified only if certain conditions specified in the BCL are met. The
indemnification provisions of the BCL are not exclusive of any other rights to
which an officer or director seeking indemnification may be entitled pursuant to
the provisions of the certificate of incorporation or by-laws of a corporation
or, when authorized by such certificate of incorporation or by-laws, pursuant to
a shareholders' resolution, a directors' resolution or an agreement providing
for such indemnification.

     The above is a general summary of certain provisions of the BCL and is
subject, in all cases, to the specific and detailed provisions of Section s
721-725 of the BCL.

     Article V, Section 1 of the PSINet's By-laws contains provisions requiring
indemnification by PSINet of its officers and directors against certain
liabilities and expenses which they may incur as

<PAGE>

officers and directors of the Company or of certain other entities in accordance
with Sections 722-723 of the BCL.

     Section 726 of the BCL also contains provisions authorizing a corporation
to obtain insurance on behalf of any officer or director against liabilities,
whether or not the corporation would have the power to indemnify against such
liabilities. Article V, Section 5 of PSINet's By-Laws indicates that it may, but
need not, maintain insurance insuring PSINet or persons entitled to
indemnification under Section 1 of Article V of the By-laws for liabilities
against which they are entitled to indemnification under Article V of its
By-laws or insuring such persons for liabilities against which they are not
entitled to indemnification under Article V of the By-laws.

ITEM 7.  Exemption from Registration Claimed.

       Not applicable.

ITEM 8.  Exhibits

       See Exhibit Index.

Item 9.  Undertakings.

       (a)        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:

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

                        (ii)     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, represent a fundamental change in the information set forth in the
registration statement;

                        (iii)    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;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
registration statement is on Form S-3 or Form S-8, and the information required
to be included in a post-effective amendment by those paragraphs is contained in
periodic reports filed by the registrant pursuant to Section 13 or Section 15(d)
of the Securities Exchange Act of 1934 that are incorporated by reference 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 that remain unsold at the
 termination of the offering.

<PAGE>


       (b) The undersigned registrant hereby undertakes that, for purposes of
determining 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 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered herein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

       (c) Insofar as indemnification for liabilities arising under the
SecuritiesAct of 1933 may be permitted to directors, officers and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise,
the registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the 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 whether
such indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.

<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 on Form S-8 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized in the City of Herndon, Commonwealth of Virginia on November 30,
1999.

                                             PSINET INC.



                                             By:/s/ William L. Schrader
                                                --------------------------------
                                                William L. Schrader, Chairman
                                                and Chief Executive Officer


                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS, that each person whose signature
appears below hereby constitutes and appoints William L. Schrader, Harold S.
Wills, David N. Kunkel, Edward D. Postal, Michael J. Malesardi, Lawrence S.
Winkler and Kathleen B. Horne, and each or any of them, his true and lawful
attorney-in-fact and agent, with full power of substitution and resubstitution,
for him and in his name, place and stead, in any and all capacities, to sign any
registration statement filed pursuant to Rule 462(b) under the Securities Act of
1933 and any and all amendments (including post-effective amendments) to this
registration statement and to any registration statement filed pursuant to Rule
462(b), and to file same, with all exhibits thereto and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
each 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 and about the
foregoing, as fully to 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 either of them, or their or his substitute or substitutes, 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.

          Name                       Title                                  Date


/s/ William L. Schrader      Chairman, Chief Executive         November 30, 1999
  ----------------------  Officer and Director (Principal
    William L. Schrader      Executive Officer)


/s/ Harold S. Wills        President, Chief Operating          November 30, 1999
  ----------------------     Officer and Director
    Harold S. Wills


/s/ David N. Kunkel        Vice Chairman, Executive Vice       November 30, 1999
  ----------------------     President and Director
      David N. Kunkel

<PAGE>


         Name                       Title                                   Date


/s/ Edward D. Postal       Executive Vice President and Chief  November 30, 1999
  ----------------------     Financial Officer (Principal
    Edward D. Postal             Financial Officer)


/s/ Michael J. Malesardi   Vice President and Controller       November 30, 1999
  ----------------------   (Principal Accounting Officer)
    Michael J. Malesardi


/s/ William H. Baumer              Director                    November 30, 1999
  ----------------------
    William H. Baumer


/s/ Ralph J. Swett                 Director                    November 30, 1999
  ----------------------
    Ralph J. Swett


/s/ Ian P. Sharp                   Director                    November 30, 1999
  ----------------------
    Ian P. Sharp


<PAGE>



                                  EXHIBIT INDEX

<TABLE>


<CAPTION>


  Exhibit No.                      Description                                        Location

      <S>         <C>                                             <C>

      4.1         1991 Stock Option Plan, as amended              Incorporated by reference to Exhibit 10.1 to the
                                                                  registration statement on Form S-1 (No.
                                                                  33-76426) of Transaction Network Services, Inc

      4.2         1994 Stock Option Plan                          Incorporated by reference to Exhibit 10.2 to the
                                                                  registration statement on Form S-1 (No.
                                                                  33-76426) of Transaction Network Services, Inc.

      4.3         Amendment to 1994 Stock Option Plan             Incorporated by reference to Exhibit 4(b) to the
                                                                  registration statement on Form S-8 (No.
                                                                  333-27159) of Transaction Network Services, Inc.

      4.4         Amendment to 1994 Stock Option Plan             Incorporated by reference to Exhibit 4(c) to the
                                                                  registration statement on Form S-8 (No.
                                                                  333-67161) of Transaction Network Services, Inc.

      4.5         Amendment to 1994 Stock Option Plan             Incorporated by reference to Exhibit 4(b) to the
                                                                  registration statement on Form S-8 (No.
                                                                  333-67163) of Transaction Network Services, Inc.

      4.6         Amendment to 1994 Stock Option Plan             Incorporated by reference to Exhibit 4(e) to the
                                                                  registration statement on Form S-8 (No.
                                                                  333-82725) of Transaction Network Services, Inc.

      5           Opinion of Counsel                              Filed herewith

      23.1        Consent of PricewaterhouseCoopers LLP           Filed herewith


      23.2        Consent of Arthur Andersen LLP                  Filed herewith

      23.3        Consent of Nixon Peabody LLP                    Included as part of Exhibit 5.

      24          Power of Attorney                               Included on the signature page of this
                                                                  registration statement.
</TABLE>



                                                                       EXHIBIT 5

                                Nixon Peabody LLP
                         Attorneys and Counselors at Law
                               437 Madison Avenue
                            New York, New York 10022



                                November 30, 1999



PSINet Inc.
510 Huntmar Park Drive
Herndon, Virginia  22070

Ladies and Gentlemen:

         We have acted as counsel to PSINet Inc., a New York corporation (the
"Company"), in connection with the Registration Statement on Form S-8 (the
"Registration Statement") to be filed by the Company on November 30, 1999 with
the Securities and Exchange Commission (the "SEC") under the Securities Act of
1933, as amended (the "Act"), for the purpose of registering with the SEC an
aggregate of up to 463,157 shares (the "Shares") of common stock of the Company,
par value $.01 per share (the "Common Stock"), consisting of: 12,001 shares
issuable upon the exercise of options granted by Transaction Network Systems,
Inc., a Delaware corporation which is a wholly owned subsidiary of the Company
("TNI"), under the 1991 Employee Stock Option Plan (the "1991 Plan"), and
451,156 shares issuable upon the exercise of options granted by TNI under the
1994 Employee Stock Option Plan, as amended (the "1994 Plan" and, together with
the 1991 Plan, the "Plans").

         This opinion is being delivered to you in connection with the
Registration Statement.

         In connection with the foregoing, we have examined, among other
documents, copies of the following: (i) the Registration Statement, (ii) the
Restated Certificate of Incorporation of the Company, (iii) the By-Laws of the
Company, as amended to the date hereof, and (iv) the Plans. We have also
examined originals or copies, certified or otherwise identified to our
satisfaction, of such corporate records of the Company, agreements and such
other instruments and certificates of officers of the Company, and have made
such investigations of law, as, in our experience, are necessary or appropriate
as a basis for the opinions expressed below.

         As to questions of fact material to our opinions expressed herein, we
have, when relevant facts were not independently established, relied upon
certificates of, and information received from, the Company and/or
representatives of the Company. We have made no independent investigation of the
facts stated in such certificates or as to any information received from the
Company and/or representatives of the Company and do not opine as to the
accuracy of such factual matters. We also have relied, without investigation,
upon certificates and other documents from, and conversations with, public
officials.



<PAGE>


PSINet Inc.
November 30, 1999
Page 2


         In addition, we have assumed that, at or prior to the time of issuance
and sale of any of the Shares: (i) no stop order shall have been issued in
respect of the Registration Statement, (ii) there shall not have occurred, since
the date of this opinion, any change in law affecting the validity of the Shares
or the ability or the capacity of the Company to issue any of the Shares, and
(iii) the Company shall not have effected any material change to its Restated
Certificate of Incorporation or By-laws.

         Members of our firm involved in the preparation of this opinion are
licensed to practice law in the State of New York and we do not purport to be
experts on, or to express any opinion herein concerning, the laws of any
jurisdiction other than the laws of the State of New York.

         Based upon and subject to the foregoing, and the other qualifications
and limitations contained herein, and after (i) the Registration Statement has
become effective under the Act and assuming that such effectiveness remains in
effect throughout the period during which shares of Common Stock are issued
pursuant to the Plans, (ii) the shares of Common Stock to be issued pursuant to
the Plans have, if required, been duly qualified or registered, as the case may
be, for sale under applicable state securities laws and all applicable
securities laws are complied with, (iii) all necessary action by the
shareholders of the Company and the Board of Directors or a duly designated
committee of the Board of Directors of the Company shall have been taken to duly
authorize the Plans and the issuance of options, other rights and Common Stock
to be issued pursuant to the Plans (the "Corporate Action"), and (iv) the
options, other rights and shares of Common Stock to be issued pursuant to the
Plans have been delivered pursuant to and in accordance with the terms of the
Plans and related agreements and instruments against payment therefor in
accordance with the terms of the relevant Corporate Action, the Plans and
related agreements and instruments, we are of the opinion that the 12,001 shares
of Common Stock issuable pursuant to the 1991 Plan, the 451,156 shares of Common
Stock issuable pursuant to the 1994 Plan, and an indeterminate number of shares
of Common Stock as may be issued by reason of any stock split, stock dividend,
recapitalization or similar transaction, will have been duly authorized, validly
issued, fully paid and non-assessable, subject to Section 630 of the Business
Corporation Law of the State of New York.

         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement. In giving such 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 SEC.

         We further consent to the filing of this opinion as an exhibit to
applications to the securities commissioners of the various states of the United
States of America, to the extent so required, in connection with the
registration of the shares of Common Stock.



<PAGE>


PSINet Inc.
November 30, 1999
Page 3



         This opinion is limited to the matters stated herein, and no opinion or
belief is implied or may be inferred beyond the matters expressly stated herein.
The opinions expressed herein are rendered as of the date hereof, and we
disclaim any undertaking to advise you of changes in law or fact which may
affect the continued correctness of any of our opinions as of a later date.

         We wish to advise you that certain attorneys with Nixon Peabody LLP own
certain shares of the Company's Common Stock.

                                                     Very truly yours,

                                                     /s/ Nixon Peabody LLP



                                                                    EXHIBIT 23.1
                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the incorporation by reference in this Registration
Statement on Form S-8 of our report dated March 9, 1999, except as to Note 11,
which is as of March 25, 1999 relating to the consolidated financial statements
and financial statement schedule of PSINet Inc. appearing in PSINet Inc.'s
Annual Report on Form 10-K for the year ended December 31, 1998.


/s/      PricewaterhouseCoopers LLP


Washington, DC
November 29, 1999



                                                                    EXHIBIT 23.2

         CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

         As independent public accountants, we hereby consent to the
incorporation by reference in PSINet's Registration Statement on Form S-8 of our
reports dated February 10, 1999, included in Transaction Network Services,
Inc.'s Form 10-K for the fiscal year ended December 31, 1998, which is
incorporated by reference in PSINet Inc.'s Current Report on Form 8-K dated
August 22, 1999.
                             /s/Arthur Andersen LLP
Vienna, Virginia
November 22, 1999



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