Revised Dates for Aether Systems 1st Quarter 2005 Earnings Release and

    Business Editors

    BALTIMORE--(BUSINESS WIRE)--April 22, 2005--Aether Systems (Nasdaq: AETH) has revised the dates for its 1st quarter 2005 earnings release and conference call. Aether Systems will release its Q1 2005 results after market close on Wednesday, May 4, 2005.
    A conference call is scheduled for Thursday, May 5 at 8:30 a.m. Eastern. To join the call, please use the following numbers:

    Dial-in number: (888) 855-5428. Ask for Confirmation Code 2435404.

    A replay of the call will be available until May 25, 2005. The recording will begin approximately one hour after the completion of the call.

    Replay number: 888-203-1112
    Access code: 2435404

    This call is being webcast by CCBN and can be accessed at Aether's web site at www.aethersystems.com.
    The webcast is also being distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.companyboardroom.com or by visiting any of the investor sites in CCBN's Individual Investor Network. Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

    About Aether Systems

    Aether Systems owns and manages a portfolio of mortgage-backed securities and other short-term government agency investments. Our principal business objective is to generate net income from the spread between the interest income on these securities and the costs of borrowing to finance their acquisition.

--30--AC/cg*

CONTACT: Aether Systems Investor Contact: Steve Bass, 443-394-5029 investor_relations@aethersystems.com

KEYWORD: MARYLAND INDUSTRY KEYWORD: GOVERNMENT BANKING REAL ESTATE BUILDING/CONSTRUCTION EARNINGS CONFERENCE CALLS SOURCE: Aether Systems

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