XO Communications Names Michael Toplisek Chief Marketing Officer for XO Business Services

An eighteen-year veteran of the telecommunications industry, Toplisek reports to XO Business Services President, Dan Wagner. "Mike is a strong leader with deep experience in establishing successful go-to-market strategies, acquiring customers, delivering new and innovative solutions, and growing market share," said Wagner. "His enterprise experience makes him particularly attuned to the needs of our rapidly growing customer base in that segment and will help XO achieve its goal to be the premier communications provider for businesses and large enterprises."

Prior to joining XO Communications, Toplisek served as senior vice president of global enterprise and collaboration services for Global Crossing. In this role he oversaw all matters related to Global Crossing's worldwide enterprise, client support, sales engineering, government, systems integration and collaboration services teams. Prior to joining Global Crossing, Mr. Toplisek held various sales leadership positions at MCI and other corporations in the telecommunications industry.

About XO Communications

XO Communications, a subsidiary of XO Holdings, Inc. (OTCBB: XOHO), is a leading nationwide provider of advanced communications services and solutions for businesses, enterprises, government, carriers and service providers. Its customers include more than half of the Fortune 500, in addition to leading cable companies, carriers, content providers and mobile network operators. Utilizing its unique combination of high-capacity nationwide and metro networks and broadband wireless capabilities, XO offers customers a broad range of managed voice, data and IP services with proven performance, scalability and value in more than 75 metropolitan markets across the United States. For more information, visit www.xo.com.