Neutral Tandem, Inc. Announces Ethernet eXchange Charter Customer Participants

CHICAGO, July 29, 2010 – Neutral Tandem, Inc. (NASDAQ: TNDM), a leading provider of tandem interconnection services, today announced the participation of ten different strategic service providers in its Ethernet eXchange Charter Customer Program. Participants include: Sidera Networks, a division of RCN Corporation (NASDAQ: SideraI), Tinet, PAETEC (NASDAQ: PAET), Broadview Networks, US Signal, Mosaic NetworX, Wilshire Connection, and ION Holding Co.

Ethernet eXchange:

Neutral Tandem’s Ethernet eXchange provides Ethernet service providers with a more efficient and simplified method of interconnecting on a one-to-many basis. Utilizing Neutral Tandem’s Ethernet eXchange service solves the complex technical and business challenges traditionally tied to interconnecting to multiple service providers on a one-on-one basis. In addition, Ethernet service providers can virtually connect to multiple access providers in several markets, through a single connection to the Neutral Tandem Ethernet eXchange.

Charter Program:

The Charter Member Program is built upon the principle of a collaborative and interactive Product Development process that engages customers from requirements formulation through service delivery. “By assembling a group of market-leading experts from well-respected Ethernet service providers and incorporating their feedback on an ongoing basis, we believe that our Ethernet eXchange will offer innovative functionality that addresses our customers’ needs and priorities,” said Surendra Saboo, Chief Operating Officer of Neutral Tandem, Inc.

Felipe Alvarez, President of Sidera, said, “The unique way Neutral Tandem has interconnected its Exchanges in major markets gives us the ability to easily establish Ethernet connections to high demand locations outside our existing footprint.”

“Tinet is honored to be part of Neutral Tandem’s Ethernet eXchange,” stated Paolo Susnik, CEO of Tinet. “Neutral Tandem’s efficient one-on-to-many interconnections will help us further extend our network into more US markets; this is a true value-add to the global carrier community and ultimately the end-users.”

Market Deployment and Availability:

Neutral Tandem also announced today that it is ready to begin accepting orders in the following six Ethernet eXchange markets: Atlanta, Boston, Chicago, Dallas, Los Angeles and New York. The company continues to plan to deploy its Ethernet eXchange switch fabric – the Cisco ASR 9000 – in eight additional markets prior to year end. Additional market deployments, both domestic and international, will be prioritized based on customer demand. To find out more about the advantages of Neutral Tandem’s Ethernet eXchange, click here.

Cautions Concerning Forward Looking Statements:

This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical fact, included in this press release regarding Neutral Tandem’s strategy, future operations, future financial position, future revenues, projected costs, prospects, plans and objectives of management are forward-looking statements. The words “anticipates,” “believes,” “expects,” “estimates,” “projects,” “plans,” “intends,” “may,” “will,” “would,” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Neutral Tandem may not actually achieve the plans, intentions or expectations disclosed in its forwardlooking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements Neutral Tandem makes. Factors that might cause such differences include, but are not limited to: risks associated with our ability to successfully develop and market Ethernet interconnection services, including but not limited to identifying, obtaining, operating and maintaining attractive network switch sites, equipment and software, cost estimation errors or overruns, interconnection delays, material delays or shortages, our inability to obtain necessary third party rights or permits on a timely basis, if at all, and other factors, including the impact of regulation, many of which are beyond our control and all of which could delay or negatively affect our ability to offer or market this new service; and other important factors included in Neutral Tandem’s reports filed with the Securities and Exchange Commission, particularly in the “Risk Factors” section of Neutral Tandem’s Annual Report on Form 10-K for the period ended December 31, 2009 and Quarterly Reports on Form 10-Q for the quarters ended March 31, 2010, as such Risk Factors may be updated from time to time in subsequent reports. Neutral Tandem does not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.

About Neutral Tandem, Inc.

Headquartered in Chicago, Neutral Tandem, Inc. is a leading provider of interconnection services to wireless, wireline, cable and broadband telephony companies. Neutral Tandem’s solutions build redundancy, security and operational efficiencies into the nation’s telecommunications infrastructure. Neutral Tandem’s solutions include both voice and Ethernet interconnection services. Neutral Tandem recently announced plans to launch 14 Ethernet eXchanges at the following locations: Atlanta, Boston, Chicago, Dallas, Denver, Detroit, Houston, Los Angeles, Miami, New York, Philadelphia, San Francisco, Seattle and Washington, D.C. Please visit Neutral Tandem’s website at:www.neutraltandem.com.