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Press Release

6.07.04 -- XO Communications Appoints Barbara Branaman as Vice President and General Manager of Hosting Business Unit. Industry Veteran Brings Over 20 Years of Proven Leadership, as XO Relaunches Concentric Brand in a Drive to Increase Hosting Market Share Among Small and Medium Sized Businesses



SAN JOSE, CA - XO Communications, Inc. (OTCBB: XOCM.OB) today announced the appointment of Barbara Branaman as vice president and general manager of its hosting business unit. In separate yet related news, XO Communications also announced a re-launch of the Concentric brand for the company's shared web hosting services, as a drive toward increasing hosting market share among small and medium sized businesses (SMBs).

"We are pleased to promote Barbara to her new role as vice president and general manager of our hosting business unit," said Tom Cady, chief marketing officer of XO Communications. "Since joining the company in 1998, she has been instrumental in growing the hosting unit through the introduction of innovative new service offerings and by securing valued private label customers, such as Microsoft. As we embark on re-launching the Concentric brand we expect continued success as she orchestrates the efforts of the engineering, finance, marketing, operations, and sales teams to address the hosting needs of today's growing businesses."

Branaman will be instrumental in designing the strategic marketing and partnership programs needed to increase Concentric's market share among small and medium businesses through innovative business-grade hosting solutions. These solutions are aimed at providing SMBs "more for their money" through superior performance, security and value to fully market and sell online.

Since joining the company in 1998, Branaman has held various marketing positions including group manager for small and medium business hosting and web manager of user experience. Prior to joining XO, Branaman was an independent consultant bringing to bear more than 12 years experience gained while serving in various marketing, engineering, user interface design and technical writing positions at Sprint, Teknekron Communications Systems, Rolm and IBM.

Branaman holds an undergraduate degree in Chinese language and literature from Oberlin College where she was a member of the Phi Beta Kappa honor society, and an MBA from Thunderbird.

About Concentric

Concentric, an XO Communications service, offers business-grade web hosting solutions that cost-effectively scale to meet the needs of today‚³s growing businesses. As the only hosting service to hold a patent for its Web hosting architecture, Concentric has designed a unique platform that delivers superior performance, reliability and security. Backed by an industry leading 99.9% SLA, a 3-Month Satisfaction Guarantee along with 24x7 customer care, Concentric offers web site hosting, email, ecommerce, sophisticated junk mail filtering and web builder tools designed to help companies effectively leverage the power of the Internet. For more information, visit http://www.concentric.com or call 866-500-9696.

About XO Communications

XO Communications is a leading broadband telecommunications services provider offering a complete portfolio of telecommunications services, including: local and long distance voice, Internet access, Virtual Private Networking (VPN), Ethernet, Wavelength, Web Hosting and Integrated voice and data services.

XO has assembled an unrivaled set of facilities-based broadband networks and Tier One Internet peering relationships in the United States. XO currently offers facilities-based broadband telecommunications services within and between more than 70 markets throughout the United States.

FOR MORE INFORMATION CONTACT:


Chad Couser / XO Communications
703-547-2746
chad.couser@xo.com