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AboveNet Connects to DuPont Fabros Technologys Data Center in Santa Clara, California

WHITE PLAINS, NY – September 22, 2011 – AboveNet, Inc. (NYSE: ABVT), a leading provider of high bandwidth connectivity solutions, today announced that it is now connected to DuPont Fabros Technology’s (NYSE: DFT) data center, SC1, located in Santa Clara, California. With the completion of the fiber build-out to SC1, AboveNet is able to provide services to all DFT data centers.

DuPont Fabros Technology’s SC1 facility is one of the largest and efficient data centers available to businesses in the Greater San Francisco Bay area. SC1 is comprised of two identical phases, totaling 360,000 gross square feet, 176,000 raised square feet and 36.4 mega watts of available critical load. Customers in the newly delivered phase one SC1 facility will now have access to AboveNet’s portfolio of Ethernet services for high-bandwidth connectivity in and between major business hubs throughout the country. AboveNet’s IP POP (point-of-presence) enables AboveNet to deliver Tier 1 IP service at affordable rates and reliable service to DFT’s tenants.

“Businesses continue to move mission-critical applications to reliable outsourced wholesale data centers to handle data intensive applications such as cloud computing, multimedia transfers, data replication and disaster recovery,” said Vinay Nagpal, Director of Carrier Relations for DuPont Fabros Technology, Inc. “We are pleased to connect to AboveNet’s high performance network to offer the bandwidth services and routes to meet the communications needs of our tenants.”

AboveNet provides a complete portfolio of metro Ethernet, WDM, Long Haul and IP transit services. DFT’s enterprise and carrier customers also can benefit from AboveNet’s world-class fiber optic network in both the U.S and Europe, with connections to buildings containing more than 450 data centers. Its infrastructure includes more than 2.3 million fiber miles, an intercity network spanning approximately 13,000 route miles and a global Tier 1 IP backbone.

“At AboveNet, we focus exclusively on the needs of the high bandwidth customer, so our network in the San Francisco Bay Area and Silicon Valley is specifically engineered to deliver fast, dedicated, secure connectivity to critical business locations,” said Xenophon Giannis, executive director of Sales for AboveNet on the West Coast. “SC1 is a key facility to connect to our network. We look forward to serving the enterprise and carrier customers in this important market.”

About AboveNet, Inc.

AboveNet, Inc. provides high bandwidth connectivity solutions for business and carriers. Its private optical network delivers key network and IP services in and among top U.S. and European markets. AboveNet’s network is widely used in demanding markets such as financial services, media, health care, retail and government

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Statements made in this press release that are not historical in nature constitute forward-looking statements within the meaning of the Safe Harbor Provisions of the Private Securities Litigation Reform Act of 1995. We cannot assure you that the future results expressed or implied by the forward-looking statements will be achieved. Such statements are based on the current expectations and beliefs of the management of AboveNet, Inc. and are subject to a number of risks and uncertainties that could cause actual results to differ materially from the future results expressed or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to, industry competition, pricing and macro-economic conditions and the Company’s financial and operating prospects. The Company’s business could be materially adversely affected and the trading price of the Company’s common stock could decline if these risks and uncertainties develop into actual events. The Company cautions you not to place undue reliance on these forward-looking statements, which speak only as of their respective dates. The Company undertakes no obligation to publicly update or revise forward-looking statements to reflect events or circumstances after the date of this presentation or to reflect the occurrence of unanticipated events. A more detailed discussion of factors that may affect the Company’s business and future financial results is included in the Company’s SEC filings, including, but not limited to, those described in “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2010 and in the Company’s subsequently filed Quarterly Report(s) on Form 10-Q.