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Press Release


  STC Associates
  Kristen Massaro
  212-725-1900 ext. 204
  [email protected]

Arbinet’s Membership Base Exceeds 1000 Members

Company offers increased opportunities for efficiency and growth through thexchange

New Brunswick, NEW JERSEY — May 22, 2008 – Arbinet-thexchange, Inc. [Nasdaq: ARBX], the robust transaction platform for buying and selling voice and IP telecommunications capacity, announced today that it has surpassed the 1,000 Member mark during the first quarter of 2008. The company also indicated that March 2008 was the highest revenue month since its inception.

Arbinet, which now has 1,045 Members on the thexchange, experienced an increase in Membership due to the company’s expansion in many emerging markets. Recently Arbinet announced its increased presence in the Middle East market, signing on a number of new customers and opening an office in Beirut to handle the demands of service providersn the region. In addition, the company has experienced membership growth in Asia, Africa and Latin America.

As Arbinet expands its presence globally, the company continues to attract buyers and sellers to its marketplace with a range of services that enhance business choices and opportunities for its Members. Arbinet’s flexible, scalable solutions and managed services enable telecommunications providers to improve business efficiency and excel in an increasingly demanding and competitive market. This 1,000 Member milestone is a result of the outstanding solutions and services Arbinet continues to provide to Members around the world.

About Arbinet
Arbinet is a leading provider of innovative voice and IP solutions empowering communications companies to create the most efficient and valuable global interconnections.  Arbinet offers the greatest flexibility in global scale, platform intelligence, and managed solutions to achieve commercial efficiency and interconnection simplicity.

Arbinet manages business relationships, back office operations and call routing for Members who route through Arbinet approximately 2% of the world’s international voice traffic to over 1,300 destinations worldwide. These Members include fixed line, mobile, wholesale and VoIP carriers as well as calling card, ISPs and content providers around the world who buy and sell voice and IP telecommunications capacity and content. For more information about Arbinet’s solutions, visit

Forward-Looking Statements

This press release contains forward-looking statements regarding anticipated future revenues, growth, capital expenditures, management’s future expansion plans, expected product and service developments or enhancements, and future operating results. Such forward-looking statements may be identified by, among other things, the use of forward-looking terminology such as: "believes," "expects," "may," "will," "should" or "anticipates," or the negative thereof or other variations thereon or comparable terminology, or by discussions of strategy that involve risks and uncertainties. Various important risks and uncertainties may cause Arbinet’s actual results to differ materially from the results indicated by these forward-looking statements, including, without limitation: the ability of Arbinet to effectively divest Broad Street Digital Limited; members (in particular, significant trading members) not trading on our exchange or utilizing our new and additional services (including DirectAxcessSM, PrivateExchangeSM, AssuredAxcessSM and PeeringSolutionsSM); continued volatility in the volume and mix of trading activity; our uncertain and long member enrollment cycle; the failure to manage our credit risk; failure to manage our growth; pricing pressure; investment in our management team and investments in our personnel; regulatory uncertainty; system failures, human error and security breaches that could cause Arbinet to lose members and expose it to liability; and Arbinet’s ability to obtain and enforce patent protection for our methods and technologies.  For a further list and description of the risks and uncertainties the Company faces, please refer to Part I, Item 1A of the Company’s Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 17, 2008, and other filings that have been filed with the Securities and Exchange Commission. Arbinet assumes no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise and such statements are current only as of the date they are made.

120 Albany St. Tower II, Suite 450, New Brunswick, NJ 08901
phone: 732-509-9100, fax: 732-509-9101, website:

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