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1/24/07

XO Communications Achieves 80 Percent Annual Growth in IP Voice Traffic

XO Communications Carries More than 15 Billion Minutes of Voice Traffic across IP Network in 2006

RESTON, VA - XO Communications today announced that the amount of voice traffic carried across its nationwide IP network exceeded 15 billion minutes in 2006. During the course of 2006, voice traffic carried across its nationwide IP grew by 80 percent, from 822 million minutes in January 2006 to approximately 1.5 billion minutes in December 2006.

“XO is a leader in VoIP solutions for businesses and communications service providers, providing the essential building blocks and end-to-end solutions that enable customers to deliver services across our nationwide, next generation IP network,” said Carl Grivner, CEO of XO Communications. “Through the investments we have made and continue to make in our network, XO is well-positioned to support the growing demand for IP voice services.”

XO Communications offers a broad suite of VoIP and wholesale network infrastructure services, including XO VoIP Origination, XO VoIP Termination, IP transit and network transport, that enable service providers to deliver IP-based voice services cost-effectively to customers. XO Communications is also a leading provider of VoIP services to businesses and enterprises. Today, more than 7,500 businesses with more than 100,000 employees nationwide utilize XOptions Flex, XO Communications’ award-winning VoIP service, to enjoy the benefits of an integrated VoIP services solution that provides enhanced features, functionality and value for voice, Internet access and web hosting, all in one simple package.

In 2000, XO Communications began the deployment of one of the largest softswitch platforms across its nationwide, private IP network to more efficiently manage voice and data traffic and support the delivery of a broad range of traditional and next generation local and long distance voice and IP services to business and service provider customers. This platform allows XO Communications to support customers that continue to rely on time division multiplexing (TDM) technology and those that have migrated to more advanced, IP-based voice technology. By managing the VoIP platform over its own private IP network, XO Communications ensures that customers’ voice traffic is delivered with the same quality and reliability of traditional telephone networks.

About XO Communications
XO Communications, a subsidiary of XO Holdings, Inc. (OTCBB: XOHO.OB), is a leading provider of national and local telecommunications services to businesses, large enterprises and communications service providers. XO offers a broad portfolio of services, including local and long distance voice, dedicated Internet access, private networking, data transport, and Web hosting services as well as bundled voice and Internet solutions. XO provides these services over an advanced, nationwide facilities-based IP network and serves 75 metropolitan markets across the United States. For more information, visit For more information contact: