About XO Communications

XO Communications (previously Nextlink Communications, Concentric Network Corporation and Allegiance Telecom, Inc.) is a telecommunications company owned by XO Holdings, Inc. XO provides voice, data and IP services to small and medium-sized business, large enterprises, government, cable TV companies, content providers, telecommunications companies and wireless service providers in more than 75 major metropolitan markets across the United States.

XO Network

XO has a wealth of network assets that are well positioned for the convergence of voice and data IP services. The high capacity XO IP network has the highest levels of performance and reliability. A suite of world-class tools that facilitate the communication of customer information and continuous network monitoring set the XO network apart from its rivals.

High capacity IP network with a multi-terabit routing core provides speed, capacity and flexibility today while allowing XO to offer services that take advantage of future IP and Voice over IP technological evolutions. Advanced transport network with terabit capacity deployed nationwide enables XO to provision services faster and provide a broad range of high-speed network transport services.

Peering infrastructure to the Internet with extensive peering relationships, XO provides direct paths to all other major Network Service Providers. Internet Access access POPs in the local markets. The extensive XO footprint ensures controlled connectivity costs.

Corporate Office
XO Communications, LLC.
13865 Sunrise Valley Drive
Herndon, Virginia 20171
United States of America
www.xo.com