XO Comm To Offer Cloud Security Service With StillSecure

PRESS RELEASE

Superior, CO – March 7, 2011 -- StillSecure', a managed network security solutions and certified compliance company, and XO Communications, (OTCBB: XOHO) one of the nation’s largest communications service providers, today announced an agreement to provide a suite of managed security services to business customers, as well as support from StillSecure’s world-class Security Operations Center professionals for XO Communications’ customers.

“The holy grail for customers is secure, fast, reliable, and cost-effective access to the services they need when they need them. By adding a suite of cloud-based network security services, XO Communications is significantly expanding our security services portfolio. This represents the continuing expansion of our cloud-based services delivery strategy.” said Mike Toplisek, Chief Marketing Officer for XO Business Services at XO Communications.

“Customers continue to struggle with securing their Internet infrastructure. XO Communications is smart to leverage their deep, trusted relationship with customers to help solve these issues with a suite of managed security services,” said David Mandell, Chief Marketing Officer, StillSecure. “Solving security problems in the cloud – prior to them hitting a customer’s premises- is the next level for forward thinking telcos. StillSecure is proud to partner with XO Communications to deliver this innovative offering to market.”

About XO Communications

XO Communications, a subsidiary of XO Holdings, Inc. (OTCBB: XOHO), is a leading nationwide provider of advanced broadband 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.

About StillSecure For IT executives facing escalating security threats and evolving compliance requirements, and data centers looking to cement long-term customer relationships, StillSecure designs and delivers managed network security and certified compliance solutions so you can focus on growing your core business.