Liebhaber Named Board Chairman of Advanced Radio Telecom

Business Wire, June 23, 2000

Business Editors, High-Tech Writers

BELLEVUE, Wash.--(BUSINESS WIRE)--June 23, 2000

Advanced Radio Telecom Corp. (ART) (Nasdaq:ARTT) today announced that Richard T. Liebhaber has been named non-executive chairman of its board of directors.

Liebhaber, 64, joined ART's board in December 1999.

"I am honored to be named ART's chairman," Liebhaber said. "The Company has done an excellent job in expanding its nationwide spectrum assets and initially deploying its networks. I look forward to taking an active leadership role at a time when ART is stepping up its sales and deployment activities."

ART, which launched its Eastern region metropolitan hub in Washington, D.C. earlier this month, is poised to launch a total of 10 new markets by year-end.

Liebhaber is a consulting managing director at Veronis, Suhler and Assoc., the New York Media Merchant Banking company. He also is on the board of directors of several communications companies, including AVICI Systems, Inc., Alcatel USA, Inc., KPNQwest and Rare Medium Group. He is also a member of the executive committee of the Abilene Internet 2 Project at the University Corporation for Advanced Internet Development (UCAID), a consortium of 155 member universities and corporate sponsors.

Liebhaber was executive vice president of MCI Communications, Corp., a member of its management committee from December 1985 to his retirement in 1995, and was a member of its board of directors. Prior to MCI, Liebhaber had a distinguished career with IBM that included the development and launch of numerous innovative joint ventures.

About Advanced Radio Telecom

Advanced Radio Telecom Corp., headquartered in Bellevue, Wash., is a provider of broadband wireless Internet Protocol (IP) access services at speeds up to 155 Mbps. ART currently owns and operates 100 Mbps broadband wireless metropolitan area networks in San Jose and Washington, D.C. and plans to expand to 40 markets over the next three years. ART is a Cisco Powered Network(TM) service provider. ART has a nationwide footprint of 39GHz spectrum licenses in the United States, and owns 26GHz and/or 39GHz spectrum licenses in the United Kingdom and several Scandinavian countries. For more information, please visit ART's web site at www.ipsp.com.

The above information includes forward-looking statements regarding network deployment. These statements are not guarantees of future performance. Known and unknown risks, uncertainties, and other factors, including without limitation, satisfying closing conditions, final FCC approval, capital requirements and other financial risks, customer demand, technological risks, management of growth, competition and government regulation may cause actual results to differ materially from the future results implied or expressed in the forward looking statements. Additional information about the most significant of such factors is set forth in ART's most recent annual report on Form 10-K. The Company does not undertake to update or revise its forward-looking statements publicly even if experience or future changes make clear that any projected results expressed or implied herein will not be realized.