iBasis Names Chief Legal Officer and Corporate Secretary.

BURLINGTON, Mass. -- iBasis, Inc. (NASDAQ: IBAS), the global VoIP company, today announced that it has named Mark Flynn, Chief Legal Officer and Corporate Secretary. He is responsible for managing the legal affairs of the company and providing counsel on a range of issues, including corporate governance, regulatory compliance, and mergers and acquisitions.

"Mark brings substantial experience in all of the major aspects of corporate legal affairs and governance," said Ofer Gneezy, president and CEO of iBasis. "We are very pleased to have him join the senior management team, and we look forward to his contributions to iBasis' continued growth and success."

Prior to joining iBasis, Flynn held senior counsel positions with several companies in the manufacturing and service sectors, as well as positions in well respected law firms. Most recently he was Vice President, General Counsel and Secretary at Imagistics International Inc., a NYSE-traded company in the document imaging industry. Prior to that, Flynn was a partner in the Business Practices Group of Wiggin & Dana, LLP, a top-tier law firm based in Connecticut. He also held general counsel positions at ServiceMaster Diversified Health Services, and Arcadian Corporation and was Senior Deputy General Counsel at Olin Corporation. Flynn received a J.D. from Fordham University School of Law and a B.S. degree from Fordham College of Business Administration.

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, including the Pingo[R] web-based offering (www.pingo.com) and disposable calling cards that are sold through major distributors and available at retail stores throughout the U.S. iBasis customers include many of the largest telecommunications carriers, including AT&T, Verizon, China Mobile, China Unicom, IDT, Qwest, Skype, Telecom Italia, and Telefonica. iBasis carried more than 11 billion minutes of international voice over IP (VoIP) traffic in 2006, and is one of the largest carriers of international voice traffic in the world1. The Company can be reached at its worldwide headquarters in Burlington, Massachusetts, USA at 781-505-7500 or on the Internet at www.ibasis.com.

iBasis and Pingo are registered marks, and the global VoIP company is a 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. Important factors that could cause actual results to differ materially from such forward-looking statements include, but are not limited to, (i) the Company's ability to execute its business plan; (ii) the extent of adoption of the Company's services and the timing and amount of revenue and gross profit generated by these services; (iii) fluctuations in the market for and pricing of these services; (iv) the other factors described in the Company's Quarterly Report on Form 10-Q for its most recently completed fiscal quarter and Annual Report on Form 10-K for its most recently completed fiscal year all of which are available at http://www.sec.gov. Such forward-looking statements are only as of the date they are made, and we have no current intention to update any forward-looking statements.

1 Telegeography 2006 data compared with iBasis 2005 traffic volume.