BURLINGTON, Mass. -- Global Audience to Include Leading Carriers, Consumer VoIP Providers, ISPs, Regulators, and Technologists

iBasis, Inc. (OTCBB: IBAS), a leader in international long distance, VoIP, and prepaid calling cards, today announced that company President and CEO Ofer Gneezy will be a featured speaker at major communications industry conferences on three continents over the next three weeks. Mr. Gneezy will discuss the major trends driving the rapid growth of VoIP and wholesale international telecommunications.

VoIP Strategies / Africa will take place April 11 - 15 in Capetown, So. Africa, and will bring together decision makers from leading fixed operators, mobile operators, ISPs, other service providers, and regulatory bodies. For more information visit www.iir-conferences.com.

VON Canada, to be held April 19 - 21 in Toronto, is one of the Voice on the Network (VON) conferences conducted by pulver.com and chaired by Jeff Pulver. Mr. Gneezy will present an Industry Perspective session on the afternoon of the 20th. For more information visit www.voncanada.com.

Global IP Carriers will be held in London on April 26 - 28. This conference attracts senior executives from the largest carriers, like NTT, Sprint, and France Telecom, as well as emerging providers such as Vonage. Mr. Gneezy will present on the morning of the 28th. For more information visit www.carriersworld.com.

About iBasis

Founded in 1996, iBasis (OTCBB: IBAS) is a leading wholesale carrier of international long distance telephone calls and a provider of retail prepaid calling services, including the Pingo(TM) web-based offering (www.pingo.com) and disposable calling cards, which are sold through major distributors and available at retail stores throughout the U.S. iBasis customers include many of the largest telecommunications carriers in the world, including AT&T, Cable & Wireless, China Mobile, China Unicom, MCI, Sprint, Skype, Telefonica, Telenor, and Telstra. iBasis has carried more than 13 billion minutes of international voice over IP (VoIP) traffic over its global Cisco Powered(TM) network, and is one of the ten largest carriers of international voice traffic in the world(1). For three consecutive years service providers named iBasis the best international wholesale carrier in ATLANTIC-ACM's annual International Wholesale Carrier Report Card(2). iBasis was also ranked among the fastest-growing technology companies in New England in the 2002, 2003, and 2004 Technology Fast 50 programs sponsored by Deloitte & Touche. 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.

Assured Quality Routing and iBasis are registered marks, Pingo, DirectVoIP, and The iBasis Network are trademarks of iBasis, Inc. Cisco Powered is a registered trademark of Cisco Systems, Inc. All other trademarks are the property of their respective owners.

Except for historical information, all of the expectations, projections and assumptions contained in the foregoing press release, including those relating to the company's current expectations regarding revenue growth, sources of revenue, margin improvement, profitability, future capital expenditures, and cash flows constitute forward-looking statements under the Private Securities Litigation Reform Act of 1995 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 extent of adoption of the company's services and the timing and amount of revenue and margin generated by these services; (ii) fluctuations in the market for and pricing of these services; and (iii) the other considerations described as "Risk Factors" in the Company's most recent Forms 10-K and 10-Q, and the company's other SEC filings. We have no current intention to update any forward-looking statements.

(1)Telegeography 2005 data compared with iBasis 2004 traffic volume.

(2)ATLANTIC-ACM International Wholesale Carrier Report Card - 2002, 2003, & 2004.