Document:

EXHIBIT 10.01
                                                                   -------------

                            THIRD AMENDMENT AGREEMENT
                            -------------------------

           THIRD AMENDMENT AGREEMENT (this "AMENDMENT AGREEMENT") dated as of
April 2, 2001 by and between DSL.net, Inc. (the "BORROWER") and Fleet National
Bank (the "BANK"), amending a certain Credit Agreement by and between the
Borrower and the Bank dated as of May 12, 1999, as amended by that Amendment and
Waiver Agreement dated as of June 12, 2000 and a Second Amendment Agreement
dated as of July 21, 2000 (as amended, the "CREDIT AGREEMENT").

                               W I T N E S S E T H
                               -------------------

           WHEREAS, pursuant to the terms of the Credit Agreement, the Bank has
made loans to the Borrower; and

           WHEREAS, the Borrower has requested that the Bank amend the Credit
Agreement; and

           WHEREAS, the Bank is willing to amend certain terms and conditions of
the Credit Agreement on the terms and conditions set forth herein.

           NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

           Section 1. Definitions. Capitalized terms used herein without
definition that are defined in the Credit Agreement shall have the same meanings
herein as therein.

           Section 2. Ratification of Existing Agreements. All of the Borrower's
obligations and liabilities to the Bank as evidenced by or otherwise arising
under the Credit Agreement, the Note and the other Loan Documents, except as
otherwise expressly modified in this Amendment Agreement upon the terms set
forth herein, are, by the Borrower's execution of this Amendment Agreement,
ratified and confirmed in all respects. In addition, by the Borrower's execution
of this Amendment Agreement, the Borrower represents and warrants that no
counterclaim, right of set-off or defense of any kind exists or is outstanding
with respect to such obligations and liabilities.

           Section 3. Representations and Warranties. All of the representations
and warranties made by the Borrower in the Credit Agreement, the Note and the
other Loan Documents are true and correct on the date hereof as if made on and
as of the date hereof, except to the extent that any of such representations and
warranties expressly relate by their terms to a prior date and for matters
previously disclosed to the Bank in writing.

           Section 4. Conditions Precedent. The effectiveness of the amendments
contemplated hereby shall be subject to the satisfaction on or before the date
hereof of each of the following conditions precedent:
<PAGE>

                                      -2-

                     (a) Representations and Warranties. All of the
           representations and warranties made by the Borrower herein, whether
           directly or incorporated by reference, shall be true and correct on
           the date hereof, except as provided in Section 3 hereof.

                     (b) Performance; No Event of Default. The Borrower shall
           have performed and complied in all material respects with all terms
           and conditions herein required to be performed or complied with by it
           prior to or at the time hereof, and there shall exist no Event of
           Default or condition which, with either or both the giving of notice
           of the lapse of time, would result in an Event of Default upon the
           execution and delivery of this Amendment Agreement.

                     (c) Corporate Action. All requisite corporate action
           necessary for the valid execution, delivery and performance by the
           Borrower of this Amendment Agreement and all other instruments and
           documents delivered by the Borrower in connection therewith shall
           have been duly and effectively taken.

                     (d) Delivery. The parties hereto shall have executed and
           delivered this Amendment Agreement, in form and substance
           satisfactory to the Bank.

                     (e) Fees and Expenses. The Borrower shall have paid to the
           Bank all reasonable fees and expenses incurred by the Bank in
           connection with this Amendment Agreement, the Credit Agreement and
           the other Loan Documents.

           Section 5. Amendments to the Credit Agreement.

                     5.1.      AMENDMENTS TO Section 1.  Section 1 of the Credit
Agreement is hereby as follows:

                     (a)   The definition of "Maturity Date" appearing in
                           Section 1 of the Credit Agreement is hereby amended
                           in its entirety to read as follows:

                           "Maturity Date: August 1, 2001."

                     (b)   The definition of "Security Documents appearing in
                           Section 1 of the Credit Agreement is hereby amended
                           by adding "and the Pledge Agreement" after "Bank" in
                           the second line of such definition.

                     (c)   The following new definitions are hereby added to
                           Section 1 in their proper alphabetical order to read
                           as follows:

                           "Pledge Agreement: The Pledge Agreement dated as of
                           the Third Amendment Effective Date made by the
                           Borrower to the Bank."

                           "Third Amendment Effective Date: April 2, 2001."

                     5.2.      AMENDMENT  TO  Section 7.2(a).  Section  2.2(b)
of the Credit Agreement is hereby amended in its entirety to read as follows:
<PAGE>
                                      -3-

                               "(b) On the Conversion Date the aggregate
           outstanding principal amount of the Loans was $4,278,563.26. Since
           such date the Borrower has made mandatory principal installment
           payments in the aggregate amount of $1,222,446.60. As a result, the
           aggregate outstanding principal balance of the Loans is
           $3,056,116.66. Accordingly, the Borrower hereby absolutely and
           unconditionally promises to pay to the Bank the remaining principal
           amount of the Loans as follows: (i) one (1) principal payment
           installment in the amount of 122,244.66 due and payable on May 1,
           2001 and (ii) thereafter, three (3) consecutive equal monthly
           installments of $977,957.33 each, such installments to be due and
           payable on the first (1st) day of each calendar month commencing on
           June 1, 2001; provided, that the outstanding principal amount of the
           Loans, together with all interest accrued thereon and all fees and
           expenses incurred by the Bank in connection therewith, shall be due
           and payable on the Maturity Date."

                     5.3.      AMENDMENT TO Section 7.3.  Section 7.3 of the
Credit Agreement is hereby amended in its entirety to read as follows

                     "7.3  INTENTIONALLY OMITTED."

           Section 6. Additional Covenants. Without any prejudice or impairment
whatsoever to any of the Bank's rights and remedies contained in the Credit
Agreement and the covenants contained therein, the Note or in any of the other
Loan Documents, the Borrower additionally covenants and agrees with the Bank as
follows:

                     (a) The Borrower shall comply and continue to comply with
           all of the terms, covenants and provisions contained in the Credit
           Agreement, the Note and the other Loan Documents, except as such
           terms, covenants and provisions are expressly modified by this
           Amendment Agreement upon the terms set forth herein.

                     (b) The Borrower will provide to the Bank such financial
           information as the Bank may reasonably request from time to time and
           at the Borrower's expense.

                     (c) The Borrower shall at any time or from time to time
           execute and deliver such further instruments, and take such further
           action as the Bank may reasonably request, in each case further to
           effect the purposes of this Amendment Agreement, the Credit
           Agreement, the Note and the other Loan Documents.

           The Borrower expressly acknowledges and agrees that any failure by
the Borrower to comply with the terms and conditions of this Section 6 or any
other provisions contained in this Amendment Agreement shall constitute an Event
of Default under the Credit Agreement.

           Section 7. Expenses. The Borrower agrees to pay to the Bank upon
demand (a) an amount equal to any and all out-of-pocket costs or expenses
(including reasonable legal fees and disbursements and appraisal expenses)
incurred or sustained by the Bank in connection with the preparation of this
Amendment Agreement and related matters, including without limitation, any
reasonable legal fees in connection with any proposed amendments or financing
arrangements between the Borrower and the Bank and (b) from time to time any and
all out-of-pocket costs or expenses (including reasonable legal fees and
disbursements) hereafter incurred or sustained by the Bank in connection with
the administration of credit extended by the Bank to the Borrower or
<PAGE>
                                      -4-

the preservation of or enforcement of the Bank's rights under the Credit
Agreement, the Note or the other Loan Documents or in respect of any of the
Borrower's other obligations to the Bank.

           Section 8. Release. The Borrower, on its own behalf and on behalf of
each of its successors and assigns, hereby waives, releases and discharges the
Bank and all affiliates of the Bank, and all of their directors, officers,
employees, attorneys and agents, from any and all claims, actions and causes of
action arising out of or in any way relating to the Loan Documents and any
documents, agreements, dealings or other matters connected with the Loan
Documents, including, without limitation, all known and unknown matters, claims,
transactions or things occurring on or before the date of this Amendment
Agreement related to the Loan Documents and the administration and enforcement
thereof.

           Section 9.       Miscellaneous.

                     (a) This Amendment Agreement shall be governed by and
           construed in accordance with the laws of the Commonwealth of
           Massachusetts.

                     (b) Except as otherwise expressly provided by this
           Amendment Agreement, all of the respective terms, conditions and
           provisions of the Credit Agreement shall remain the same. It is
           declared and agreed by each of the parties hereto that the Credit
           Agreement, as amended hereby, shall continue in full force and
           effect, and that this Amendment Agreement and the Credit Agreement be
           read and construed as one instrument, and all references in the Loan
           Documents to the Credit Agreement shall hereafter refer to the Credit
           Agreement, as amended by this Amendment Agreement

           IN WITNESS WHEREOF, each of the parties hereto have caused this
Agreement to be executed in its name and behalf by its duly authorized officer
as an instrument under seal as of the date first written above.

                                         FLEET NATIONAL BANK

                                         By: /s/ Suzanne Mackay
                                            ------------------------------
                                             Its: Vice President

                                         DSL.NET, INC.

                                         By: /s/ Stephen Zamansky
                                            ------------------------------
                                             Its: Vice PresidentEXHIBIT 10.02
                                                                   -------------

                                PLEDGE AGREEMENT

         DSL.net, Inc., [_] an individual [X] Delaware corporation, having a
mailing address of 545 Long Wharf Drive, 5th Floor, New Haven, CT 06511
(hereinafter jointly and severally if more than one, referred to as the
"Pledgor"), and FLEET NATIONAL BANK, a national banking association duly
organized and existing by and under the laws of the United states of America
having an office located at 100 Federal Street, Boston, Massachusetts 02110
(hereinafter referred to herein as the "Bank"), hereby agree as follows:

1.       Definitions.  The following definitions apply:

Borrower:  Borrower shall mean DSL.net, Inc. (hereinafter jointly and severally
if more than one, referred to as the "Borrower").

Liabilities: All obligations, indebtedness and liability of any type of the
Borrower and the Pledgor to the Bank, arising out of or in connection with or
which relates to that certain Credit Agreement between the Pledgor and the Bank
dated as of May 12, 1999, as amended from time to time, whether now existing or
hereafter incurred, whether direct, indirect, absolute or contingent, whether
otherwise guaranteed or secured, and howsoever evidenced or acquired, and
expenses or costs incurred by the Bank in the administration of this Pledge
Agreement and the enforcement of any of its rights with respect thereto.

For good and valuable consideration, the receipt and sufficiency of which is
hereby acknowledged, and for and in consideration of including the Bank to
extend credit to the Borrower in the principal amount referred to above, the
Pledgor hereby pledges to the Bank as collateral security for said extension of
credit, the following pledged collateral:

Pledged Collateral: (i) The property delivered or otherwise transferred by the
Pledgor to the Bank and consisting, as of the date of this Agreement, of the
property described on Exhibit A attached hereto and made a part hereof; and any
and all substitutions, additions and accessions thereto upon which the Pledgor
hereby grants and pledges to the Bank, and upon which the Bank shall have
absolute control over, which Pledged Collateral shall include, but not be
limited to, investment property, securities, security entitlements and any and
all financial assets credited to said Pledged Collateral; and (ii) all proceeds
of the foregoing, including, without limitation, the roll-over or reinvested
proceeds of the foregoing. Any delivery or transfer of any of the Pledged
Collateral to an agent or custodian designated by the Bank shall be deemed a
delivery or transfer to the Bank.

2. Security Interest. The Pledgor hereby pledges, hypothecates, and impresses
the Pledged Collateral with a lien in favor of the Bank, and grants to the Bank
a security interest in the Pledged Collateral (which shall be a first priority
lien), to secure the punctual payment and performance of all the Liabilities.
The Borrower shall have no right to the Pledged Collateral or to withdraw any
amount of the Pledged Collateral from the Account of the
<PAGE>

Bank until all of the Liabilities have been paid in full in cash; provided, that
the Bank is hereby authorized and directed by the Borrower to withdraw amounts
of the Pledged Collateral from the Account of the Bank to pay the monthly
installments of principal and interest in respect of the liabilities as the same
become due and owing.

3. Pledgor's Additional Obligations. The Pledgor agrees that: (1) any
distribution in kind received by the Pledgor from any part for or on account of
the Pledged Collateral, including distributions of stock as a dividend or split
of any of the Pledged Collateral, option or rights, whether as an addition to,
in substitution of, or exchange for any instruments issued under or in respect
of the Pledged Collateral (which shall also be deemed to be included in the
Pledged Collateral) shall be accepted by the Pledgor as agent for the Bank and
the Pledgor shall hold same in trust on behalf of and for the benefit of the
Bank and shall immediately deliver in the form received with any required
endorsement; (2) additional collateral in form and kind satisfactory to the Bank
will be deposited by the Pledgor with the Bank if the Bank at any time deems the
Pledged Collateral insufficient or unsatisfactory; (:3) any note or other
instrument executed and delivered to the Pledgor by any party to evidence any
obligations of such party with respect to the Pledged Collateral shall be
immediately delivered with any required endorsement to the Bank. All such items
shall be held by the Bank in accordance with the terms of this Pledge Agreement.

The Pledge agrees to pay to the Bank on demand all reasonable fees, costs and
expenses incurred by the Bank in connection with the administration of this
Pledge Agreement, including, without limitation, overnight courier fees, lien
search fees, and filing and recording fees.

The Pledgor shall deliver to the Bank all stock certificates, stock powers,
documents or instruments evidencing the Pledged Collateral and shall execute
(with signatures guaranteed when requested by the Bank) and deliver to the Bank
and/or third parties designated by the Bank such additional documents, notices,
requests and other instruments as the Bank deems necessary or advisable to
confirm, effect or preserve the pledge or perfection of the Bank's security
interest in the Pledged Collateral and to protect the Bank's rights under this
Pledge Agreement. Pledgor shall have no obligation to replenish any amount
withdrawn by the Bank and applied to Liabilities so long as the Bank is not
required to return or disgorge any amounts applied to the Liabilities.

4. Treasury Securities. If the Bank shall at any time so require all Pledged
Collateral which is in book-entry form in the Federal Reserve System
("Book-Entry Collateral") shall be delivered in the following manner: The Bank
shall cause the appropriate instructions to be entered in the Federal Reserve
Book book-entry system to accomplish a book-entry transfer of all Book-Entry
Collateral to a general account maintained at the Federal Reserve Bank of Boston
by the Bank in accordance with Subpart O of Part 306 or Subparts A, B and C of
Part 350, as applicable, of the Regulations of the United States Treasury
Department and any other applicable regulations. The name of the Bank shall
appear as the owner of Book-Entry Collateral on the books and records of the
Federal Reserve Bank of Boston. Upon receipt of Book-Entry Collateral, the Bank
shall promptly send to the Pledgor written confirmation of such receipt, which
confirmation shall identify the type and amount of such Book-Entry Collateral.

5. Certain Rights and Duties of Bank. The Pledgor acknowledges that: the Bank
has no duty of any type with respect to the Pledged Collateral except for the
use of due care in

                                       2
<PAGE>

safekeeping any of the Pledged Collateral actually in the physical custody of
the Bank; prior to the occurrence of any event of default described in the
succeeding paragraph, the Bank's rights with respect to the Pledged Collateral
shall be limited to the Bank's rights as a secured party and pledgee and the
right to perfect its security interest, preserve, enforce and protect the lien
granted hereunder and its interest in the Pledged Collateral; and the Bank may
sell, assign or grant participation's in any of the Liabilities and any of the
Pledged Collateral and that the Bank's purchaser, assignee or participant shall
have the same rights and privileges with respect to such Liabilities and Pledged
Collateral as the Pledgor grants to the Bank under this Pledge Agreement. With
respect to any Pledged Collateral with a stated maturity date (including,
without limitation, certificates of deposit and other term accounts), the Bank
is authorized and directed, upon maturity, to roll-over and reinvest such
Pledged Collateral in a similar investment, with such tenor and interest rate or
yield as the Bank, in its discretion, deems to be reflective of prevailing
market conditions. The Bank may, but shall not be obligated to, at any time,
before or after the occurrence of any event of default described in the
succeeding paragraph, transfer the Pledged Collateral into or out of its own
name or that of its nominee, at the Bank or its nominee may receive any and all
interest, income and any distributions thereon, and hold the same as Pledged
Collateral, or apply the same to the Liabilities, whether or not an event of
default has occurred. Prior to the occurrence of any event of default described
in the succeeding paragraph, the Bank agrees that it will not vote any Pledged
Collateral constituting securities or closely held capital stock.

6. Representations and Warranties. The Pledgor represents, warrants and agrees
that: (a) the Pledgor has good and valid title to the Pledged Collateral, free
and clear of any liens, charges or encumbrances thereon or affecting the title
thereto; (b) the Pledgor has good right and lawful, authority to pledge, assign,
transfer, deliver, deposit, set over and confirm unto the Bank the Pledged
Collateral as provided herein and still warrant and defend the title thereto and
the security interest therein conveyed to the Bank by the Pledge Agreement
against all claims of all persons and will maintain and preserve such security
interest; (c) the execution, delivery and performance of the Pledge Agreement
and this Rider (the "Agreement") and the pledge and/or delivery of the Pledged
Collateral to the Bank do not and will not contravene any agreement, commitment,
indenture, contract or other obligation or restriction affecting the Pledgor;
(d) the Agreement is the legal, valid and binding obligation of the Pledgor,
enforceable in accordance with its terms; (e) the Agreement will not violate any
provision of law applicable to the Pledgor; and (F) no authorization, approval,
or other action by, and no notice to or filing with, any governmental authority
or regulatory body is required for the pledge by Pledgor of the Pledged
Collateral pursuant to the Agreement or for the execution, delivery, or
performance of the Agreement by Pledgor. The Pledgor covenants that it will have
the like title to and right to pledge any other property of the Pledgor at any
time hereafter purported to be pledged to the Bank hereunder.

7. Events of Default: Remedies. Upon occurrence of any event of default under
any instrument evidencing any of the Liabilities or of any of the following
events: (1) default in the payment or performance of any other of the
obligations or liabilities of the Pledgor under any agreement between the Bank
and Pledgor; (2) the Pledgor, if a business entity, discontinues business
operations at any of the Pledgor's locations; (3) the Pledgor is generally
unable to pay debts as they become due or the Bank deems itself insecure; (4)
the Pledgor makes a general

                                       3
<PAGE>

assignment for the benefit of creditors; (5) the entry of a decree, order or
order for relief by a court having jurisdiction of a case initiated by or
against the Pledgor under the Federal bankruptcy code or an y other federal or
state laws pursuant to which a receiver, liquidator, assignee, custodian,
trustee, sequestrator, debtor in possession, examiner or other similar official,
is appointed for the Pledgor or any of the Pledgor's property, with or without
consent, for any purpose whatsoever; (6) a substantial part of the property of
the Pledgor is taken by attachment, execution or any other form of legal
process; (7) the assertion of any levy, seizure or attachment on the Pledged
Collateral; or (8) death of an individual Pledgor or dissolution or termination
of legal existence of a corporate, limited liability company, partnership or
trust Pledgor, then the Bank, with or without notice to the Pledgor and without
demand for additional collateral, may, in addition to any other rights set forth
in this Agreement or available under applicable law, (a) vote any Pledged
Collateral constituting securities or closely held capital stock; (b) sell at
public or private sale any or all of the Pledged Collateral, which the Bank may
purchase free from any right of redemption; or, (c) apply the Pledged Collateral
to the Liabilities at its discretion in its own name or in the name of the
Pledgor take any action for the collection of the Pledged Collateral, including
the filing of a proof of claim in insolvency proceedings, and may receive the
proceeds thereof and execute release therefor. After deducting its expenses,
including reasonable attorney's fees (which may include costs allocated by the
Bank's internal law department), incurred in the sale or collection of the
Pledged Collateral, the Bank shall apply the proceeds to the Liabilities and
shall account to the Pledgor for any surplus. The Pledgor agrees that the Bank
has no obligation to sell or otherwise liquidate the Pledged Collateral in any
particular order or to apply the proceeds thereof to any particular portion of
the Liabilities. The Pledgor further agrees that after the occurrence of an
event of default, the Bank shall have no obligation to vote any Pledged
Collateral constituting securities or closely held capital stock.

In connection with any secured party's sale, the Bank is authorized, if it deems
it advisable to do so, in order to comply with any applicable securities laws,
to restrict the prospective bidders or purchasers to persons who will represent
and agree that they are purchasing the Pledged Collateral for their own account
for investment, and not with a view to the distribution or re-sale thereof.
Sales made subject to such restriction shall be deemed to have been made in a
commercial reasonable manner.

8. Power of Attorney, Etc. The Pledgor hereby irrevocably constitutes and
appoints the Bank the true and lawful attorney-in-fact for and on behalf of the
Pledgor with full power of substitution and revocation in its own name or in the
name of the Pledgor, from time to time in the Bank's discretion, to take any
action and to execute any instrument which the Bank may deem necessary or
advisable to confirm, perfect, preserve, enforce or protect the pledge of the
security interest as herein contemplated, including, without limitation, to
indorse in favor of the Bank any of the Pledged Collateral; cause the transfer
of an y of the Pledged Collateral in such name as the Bank may direct; cause the
issuance of certificates for book-entry and/or uncertificated securities; renew,
extend or roll over any Pledged Collateral; to receive, endorse and collect the
Pledged Collateral made payable to the Pledgor representing any dividend,
interest payment or other distribution in respect of the Pledged Collateral or
any part thereof and to give full discharge for the same; to execute, deliver
and record any and all financing statements, continuation statements, discretion
may deem necessary or advisable to perfect, preserve, enforce or protect the
lien granted hereunder and its interest in the Pledged Collateral

                                       4
<PAGE>

and to carry out the purposes of this Pledge Agreement, including but without
limiting the generality of the foregoing, any and all proofs of claim in
bankruptcy or other insolvency proceedings of the Borrower, with the right to
collect and apply to the Liabilities all distributions and dividends made on
account of the Pledged Collateral. The rights and powers conferred on the Bank
by the Pledgor are expressly declared to be coupled with an interest and shall
be irrevocable until all the Liabilities are paid and performed in full. A
carbon, photographic, or other reproduction of a security agreement (including
this Pledge Agreement) or a financing statement is sufficient as a financing
statement. The powers conferred on the Bank here4under are solely to protect the
interests of the Bank in the Pledged Collateral and shall not impose any duty
upon the Bank to exercise any such powers. The Bank shall be accountable only
for amounts that it actually receives as a result of the exercise of such
powers, and neither it nor any of its officers, directors, employers or agents
shall be responsible to the Pledgor for any act or failure to act except for its
own willful misconduct taken or omitted in bad faith.

9. Miscellaneous. This Pledge Agreement and the Pledged Collateral shall not be
in any way affected by the extension of time or renewal of any of the
Liabilities, the modification in any manner or the taking or release in whole or
in part of any security therefor or the obligations of any endorsers, sureties,
guarantors or other parties or the granting of any other indulgences to the
Borrower or to the Pledgor. No termination of this Pledge Agreement shall be
effective in any event until the Bank in its discretion determines that the
Liabilities of the Borrower and Pledgor covered by this Pledge Agreement have
been satisfied in full.

10. Notices. Except as otherwise specifically provided for herein, any notice,
demand or communication hereunder shall be given in writing (including facsimile
transmission or telex) and mailed or delivered to each party at its address set
forth below, or, as to each party, at such other address as shall be designated
by such party by a prior notice to the other party in accordance with the terms
of this provision.

Any notice to the Bank shall be sent as follows:
Fleet National Bank
100 Federal Street
Boston, Massachusetts 02110
Attention:  Susan Mackay, Communications
            ----------------------------

Any notice to the Pledgor shall be sent as follows:
DSL.net, Inc.                               (Pledgor Name)
--------------------------------------------
545 Long Wharf Drive, 5th Floor     (Pledgor Street Address)
------------------------------------
New Haven, CT 06511                 (City, State and Zip)
------------------------------------
Attention: Stephen Zamansky
           ----------------

All notices hereunder shall be effective (i) five (5) business days after such
notice is mailed, by registered or certified mail, postage prepaid (return
receipt requested), (ii) upon delivery by hand, (iii) upon delivery if delivered
by overnight courier (such delivery to be evidenced by the courier's records),
and (iv) in the case of any notice or communication by telex or telecopy, on the
date when sent.

                                       5

<PAGE>

11. Joint and Several Obligations; Construction. If more than one Pledgor has
signed this Pledge Agreement, the obligations of the Pledgor are joint and
several. The term "Pledgor" and all pronouns referring thereto as used herein
shall be construed in the masculine, feminine, neuter or singular or plural as
the context may require.

12. Choice of Law. This Pledge Agreement is executed under and shall be
construed in accordance with the local laws (excluding the conflict of laws
rules, so-called) of Commonwealth of Massachusetts (State).

13. Successors and Assigns. This Pledge Agreement shall inure to be benefit of
the Bank and its successors and assigns and shall bind the Pledgor and the
successors, representatives, legal representatives and/or heirs and assigns of
the Pledgor.

This Pledge Agreement has been executed by the Pledgor and the Bank as of the
2nd day of April, 2001.

EXECUTED IN THE PRESENCE OF:             PLEDGOR:
                                         DSL.NET, Inc.

/s/ Walter Keisch                        /s/ Stephen Zamansky
-------------------------                --------------------
Witness as to Pledgor                    Pledgor Name: Stephen Zamansky
                                                       Vice President

EXECUTED IN THE PRESENCE OF:             FLEET NATIONAL BANK

illedgible                               By: /s/ Suzanne Mackay
-------------------------                --------------------
Witness as to Bank                       Title: Vice President
                                         Date:  4/2/01

SEE EXHIBIT "A" ATTACHED HERETO, MADE A PART HEREOF AND INCORPORATED HEREIN BY
REFERENCE.

                                       6

<PAGE>

                                    EXHIBIT A

                        DESCRIPTION OF PLEDGED COLLATERAL

I.       Securities and Closely Held Capital Stock (Corporate)

ISSUER         NO. OF SHARES          CERTIFICATE NO.              CUSIP NO.
------         -------------          ---------------              ---------

II.      Securities (U.S. Government, Federal Agency Securities, and Corporate
         Issuances)

<TABLE>
<CAPTION>
<S>                   <C>               <C>           <C>                        <C>                <C>
                                         PAR ISSUE     CUSIP OR TRANSACTION
DESCRIPTION            ISSUE DATE        VALUE         NO.                        MATURITY DATE      RATE
-----------            ----------        ---------     --------------------       -------------      ----
</TABLE>

III.     Certificates of Deposit

ISSUER             PAR VALUE            INTEREST RATE            MATURITY DATE
------             ---------            -------------            -------------

IV.      OTHER

         A cash sum of U.S. $3,123,259.55 deposited into the interest bearing
         account no. DSL06462 (the "Account"), together with any and all
         interest accruing thereon, and any and all certificates of deposit into
         which such amounts are invested.

THE COLLATERAL PLEDGED HEREIN IN THE SOLE NAME OF THE PLEDGOR, SHALL BE HELD AT
FLEET NATIONAL BANK.

Pledgor's Initials:

       SZ
------------------

Date:    4/2/01
     -------------

                                       7

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