NEW BRUNSWICK, N.J., April 30 /PRNewswire-FirstCall/ -- Arbinet-thexchange, Inc. (NasdaqGM: ARBX), a leading provider of innovative voice and IP solutions for buying and selling telecommunications capacity, announced today that it will hold a conference call on Thursday, May 7, 2009 at 5:00 p.m. Eastern Time to discuss the Company's first quarter results for the period ended March 31, 2009. The news release announcing the first quarter 2009 results will be disseminated on May 7, 2009 after the Nasdaq stock market closes. The dial-in number for the live audio call beginning at 5:00 p.m. Eastern Time is 888-562-3654 or 973-582-2703 for international callers; the passcode is 97725325. A live web cast of the conference call will be available on Arbinet's web site at http://www.arbinet.com/. A replay of the call will be available from 8:00 p.m. Eastern Time on Thursday, May 7, 2009 through midnight on May 14, 2009 at http://www.arbinet.com/ and by telephone at 800-642-1687, or 706-645-9291 for international callers; the passcode is 97725325. 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. Arbinet Members include fixed line, mobile, wholesale and VoIP carriers as well as calling card, ISPs, ASPs and content providers around the world who buy and sell voice and IP telecommunications capacity. For more information about Arbinet's solutions, visit http://www.arbinet.com/. Contacts: Jack Wynne, CFO Arbinet-thexchange, Inc. 732-509-9230 Andrea Priest / Andi Salas Joele Frank, Wilkinson Brimmer Katcher 212-355-4449 DATASOURCE: Arbinet-thexchange, Inc. CONTACT: Jack Wynne, CFO of Arbinet-thexchange, Inc., +1-732-509-9230; or Andrea Priest, or Andi Salas, both of Joele Frank, Wilkinson Brimmer Katcher, +1-212-355-4449 Web Site: http://www.arbinet.com/

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