Arbinet Names John Tolton as Vice President for the Asia-Pacific Region

NEW BRUNSWICK, NJ and SINGAPORE--(Marketwire - September 3, 2009) - Arbinet Corporation (NASDAQ: ARBX), a leading wholesale telecommunications service provider that offers three ways for carriers and service providers to terminate international voice traffic, announces today it has named John Tolton as Vice President for the Asia-Pacific Region. Arbinet's voice termination options include thexchange™, the industry's leading marketplace for buying and selling voice communications, a traditional wholesale model, and an easy, low-risk outsourcing approach called Private Exchange(SM).

With more than 18 years experience in the Asia-Pacific region, John has held senior management positions with mobile and international long distance companies and has been a leader in introducing Next Generation networks to carriers across Asia. Prior to joining Arbinet, Tolton was Vice President, Asia-Pacific for iBasis where his experience in International Long Distance and IP telephony helped to forge key relationships and partnerships with numerous Tier One mobile and fixed line carriers, ISPs and emerging service providers. Prior to iBasis, Tolton was Chief Operating Officer at mobile carrier Nextel Philippines where he was instrumental in restructuring the company, turning negative EBIDTA into positive growth and in structuring a management buyout from Nextel International.

Tolton is responsible for building Arbinet's International voice business with traditional and emerging carriers, mobile operators and prepaid companies across the Asia-Pacific region. He reports to Arbinet's Senior Vice President of Sales & Marketing, Dan Powdermaker.

"We are excited to announce the appointment of John Tolton to the Arbinet sales leadership team," commented Shawn O'Donnell, President and CEO of Arbinet. "John has an impressive track record in the Asia-Pacific region and extensive industry knowledge which will support Arbinet's customers, suppliers and exchange members as the company provides varied and flexible solutions to the Asian marketplace."

For more information about Arbinet, the company's leading International Voice Trading Exchange™, Arbinet Carrier Services, Private Exchange(SM) (PEX) or Arbinet Data Exchange, please visit www.arbinet.com.

About Arbinet

Arbinet is a leading provider of international voice and IP solutions to carriers and service providers globally. With more than 1100 carriers across the world connected to the Arbinet Network, Arbinet combines global scale with sophisticated platform intelligence, call routing and industry leading credit management and settlement capabilities. Customers and suppliers include many leading 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. The company can be reached at its corporate headquarters in New Brunswick, NJ, at +1.732.509.9100 or by email at sales@arbinet.com.

Forward-Looking Statements

This press release may contain forward-looking statements regarding anticipated future revenues, growth, capital expenditures, management's future expansion plans, expected product and service developments or enhancements, discussions of strategy, and future operating results. Various risks and uncertainties may cause Arbinet's actual results to differ materially. 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 16, 2009, 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 Street, Tower 2, Suite 450, New Brunswick, NJ 08901 phone: +1 732.509.9100, fax: +1 732.509.9101, website: www.arbinet.com.

Contact Information: Ilissa Miller Jaymie Scotto & Associates 1.866.695.3629 Michelle Midura Arbinet 1.732.509.9235