UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                           Amendment No. 1 to FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

                                   May 3, 2007

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

                Date of Report (Date of earliest event reported)

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

                                  iBASIS, INC.
                               -------------------
               (Exact Name of Registrant as Specified in Charter)


            DELAWARE                 000-27127                  04-3332534
- --------------------------------------------------------------------------------
 (State or Other Jurisdiction      (Commission              (IRS Employer
       of Incorporation)           File Number)           Identification No.)


                     20 Second Avenue, Burlington, MA 01803
            ---------------------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)

                                 (781) 505-7500

              (Registrant's telephone number, including area code)
                                 ---------------


Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

[x] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))



Item 2.02.   Results of Operations and Financial Condition.

On Thursday, May 3, 2007, iBasis, Inc. (the "Registrant") issued a press release
regarding selected results for the first quarter ended March 31, 2007. A copy of
this press release is being filed herewith as Exhibit 99.1 and is incorporated
herein by reference.

Item 8.01.   Other Events

The information set forth in Item 2.02 above is incorporated by reference into
this Item 8.01.

Item 9.01.   Financial Statements and Exhibits.

        (d)     Exhibits.

                Exhibit
                Number            Description
                ------            -----------

                Exhibit 99.1    Press Release, dated May 3, 2007


                                    SIGNATURE
                                    ---------


     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


Date: May 4, 2007          iBasis, Inc.

                           By: /s/ Richard G. Tennant
                               ------------------------------------------
                               Richard G. Tennant
                               Senior Vice President, Finance and Administration
                               And Chief Financial Officer
                               (Principal Financial and Accounting Officer)



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