iBasis CFO Richard Tennant to Present at Imperial Capital Global Opportunities Conference

BURLINGTON, MASS – 11/04/2009 – November 4, 2009 iBasis, Inc. (NASDAQ: IBAS), a KPN affiliate, today announced that company CFO Richard Tennant will present at the Imperial Capital 3rd Annual Global Opportunities Conference on Thursday, November 5th in New York.Mr. Tennants presentation will commence at 3:55 p.m. EST and will focus on iBasis significant value proposition. A live webcast of the presentation will be available on the iBasis investor website (http://investor.ibasis.com). The full investor presentation is also available on the site.

About the Conference
The Imperial Capital 3rd Annual Global Opportunities Conference will take place November 4 and 5 at the New York Palace on Madison Avenue in New York. The conference brings leading public and private companies together to discuss their strategic growth, future financing, and capital markets plans. For more information, visit the Imperial Capital website at www.imperialcapital.com.

About iBasis
Founded in 1996, iBasis (NASDAQ: IBAS) is a leading wholesale carrier of international long distance telephone calls and a provider of retail prepaid calling services and enhanced services for mobile operators. iBasis customers include KPN, KPN Mobile, E-Plus, BASE, TDC and many other large telecommunications carriers such as Verizon, Vodafone, China Mobile, China Unicom, IDT, Qwest, Skype, Telecom Italia, and Telefonica. In October 2007, iBasis acquired KPN Global Carrier Services to create one of the three largest carriers of international voice traffic in the world, and KPN became a majority stockholder of iBasis. The company carried approximately 24 billion minutes of international voice traffic in 2008. The Company can be reached at its worldwide headquarters in Burlington, Mass., USA at +1 781-505-7500 or on the Internet at www.ibasis.com.

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iBasis is a registered trademark of iBasis, Inc. All other trademarks are the property of their respective owners.

Except for historical information, all of the expectations, plans and assumptions contained in the foregoing press release constitute forward-looking statements under Section 21E of the Securities Exchange Act of 1934 and involve risks and uncertainties that could cause results to vary materially. For a description of certain of these risks and uncertainties please read the Company’s most recent Annual Report on Form 10-K and other periodic and current reports, all of which are available atwww.sec.gov. Such forward-looking statements are only as of the date they are made.