Advanced Radio Telecom Completes Agreement for Major Spectrum Acquisition.

Business Editors and Technology Writers

BELLEVUE, Wash.--(BUSINESS WIRE)--April 17, 2000

Advanced Radio Telecom Corp. (ART) (Nasdaq:ARTT) today announced that it has entered into a definitive purchase agreement with respect to the previously announced transaction with BroadStream Communications Corporation to acquire up to 378 39GHz licenses for up to approximately 10.1 million shares of ART common stock representing a price of $36 per share.

"With our recently announced spectrum acquisitions, we will more than double the number of 39 GHz licenses we own in the U.S. Over two-thirds of BroadStream's licenses expire in 2006 or later, supporting ART's long-term growth opportunities in both our top 40 markets and secondary markets. The additional spectrum will allow ART to build larger Fast Ethernet 100 Mbps metro networks and dedicated OC-3 links that provide customers with connectivity at speeds up to 155 Mbps," said Robert McCambridge, ART president and COO. "We launched the POP/gateway location in Los Angeles in the first quarter as planned and we expect to offer commercial services this quarter in Los Angeles, Houston and Washington DC. The progress we have made to date puts us on target to achieve the 10 market rollout we announced earlier this year."

About ART

Advanced Radio Telecom Corp. (Nasdaq:ARTT), headquartered in Bellevue, Wash., is a provider of broadband Internet Protocol (IP) access services at speeds up to 155 Mbps. ART currently owns and operates broadband wireless metropolitan area networks in San Jose, Seattle, Portland, Ore., and Phoenix, and plans to expand to 40 major markets over the next three years. ART is a Cisco Powered Network(TM) service provider and has a strategic relationship with Qwest Communications International Inc. (NYSE:Q). ART has a nationwide footprint of 39GHz spectrum licenses in the United States, and owns 26 GHz and/or 39 GHz 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 consummation of pending transactions, network deployment, operations and future growth. These statements are not guarantees of future performance. Known and unknown risks, uncertainties, and other factors, including without limitation, risks relating to satisfaction of conditions to closing, securing financing, availability of additional financial resources, capital requirements, technological risks, the ability to meet financing conditions, 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.