AboveNet Expands to Key European Markets

Customers in the U.S., London, Frankfurt, Amsterdam and Paris will be able to connect seamlessly over a dedicated, high bandwidth network

WHITE PLAINS, New York and LONDON, September 20, 2010 - AboveNet, Inc. (NYSE: ABVT), a leading provider of high bandwidth
connectivity solutions, today announced it is expanding its international
network to key European markets with growing demand for dedicated, high
performance and high bandwidth services. Customers will be able to connect
seamlessly between the U.S., London, Frankfurt, Amsterdam and Paris.

The expansion provides high bandwidth customers with connectivity between
and within top business hubs in the U.S. and Europe. Customers will benefit
from AboveNet's wide range of next-generation optical, Ethernet and IP-based
services and existing infrastructure that includes 2 million fiber miles in
16 metro markets, an intercity network spanning approximately 12,000 route
miles and a global Tier 1 IP backbone.

AboveNet's expansion specifically targets markets with a high
concentration of web-centric businesses, financial services organizations and
enterprises with a multinational presence. These markets also have a
significant number of private and carrier neutral data centers as well as
being key Internet hub cities which further increases high bandwidth
transport demand.

"Ovum's recent research found that European markets are indeed moving
towards high bandwidth Ethernet requirements with more enterprises now
investing in this type of infrastructure to conduct business competitively,"
said Ian Redpath, Principal Analyst at Ovum. "AboveNet's focus on high
bandwidth services and strategy of offering their capability in more key
markets in a seamless manner will resonate with these target customers."

AboveNet focuses exclusively on enterprise and carrier customers who need
high-bandwidth data connectivity as a mission critical part of their business
infrastructure. With AboveNet's network expansion, these businesses will have
an alternate choice to meet their bandwidth needs to ensure performance and
reliability across their international locations.

The new network infrastructure will include dynamic optical networks
based on ROADM technology in each of London, Paris, Frankfurt and Amsterdam
with an advanced IP/Ethernet router layer to support packet-based services.
These markets will also be interconnected with a highly scalable European
long-haul network with over 3.5Tbps of system capacity as well as
transatlantic circuit capacity to the U.S. network. In total, these
investments will provide seamless, scalable and high performance capability
across these key European markets.

The network expansion is also centered on key data centers and will allow
AboveNet to deliver services directly to over 30 of the most significant data
centers in these markets. AboveNet is already connected to more than 400 data
centers globally and is a leading provider of data center connectivity. The
company expects the expansion to be completed in 2010.

"AboveNet remains focused on investing in markets where bandwidth demands
continue to increase," said Bill LaPerch, chief executive officer of
AboveNet. "The expansion of our network across Europe will enable existing
and new customers to benefit from the fastest speeds and most secure
connections to their business critical data and applications."

About AboveNet Inc.

AboveNet, Inc. provides high bandwidth connectivity solutions for
businesses and carriers. Its private optical network delivers key network and
IP services in and among top U.S. metro markets and globally. AboveNet's
network is widely used in demanding markets such as financial services,
media, health care, retail and government. www.above.net.

    Contact Information

    Kristen Hyland
    AboveNet Public Relations
    +1-914-993-1250
    khyland@above.net

    Melissa Miller
    AboveNet Public Relations UK
    +44-0-20-7220-3856
    mmiller@above.net

Kristen Hyland, AboveNet Public Relations, +1-914-993-1250, khyland at above.net, or Melissa Miller, AboveNet Public Relations UK, +44(0)20-7220-3856, mmiller at above.net