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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

KA4U callsign genealogy

Currently held by Geohagan, Clifford D

The FCC publishes a previous_call_sign on every amateur license — a self-link to the licensee's prior callsign. Following those links produces the chain below.

Previous callsigns

Older callsigns held by KA4U's current licensee, walking backwards.

  1. WB2ORDcancelled· E
    Edwards, Lars TALgranted 2006-09-06cancelled 2007-03-23

Successor callsigns

Callsigns held now by people who previously held KA4U.

  1. KO4CGcancelled· E
    Geohagan, Clifford DALgranted 2005-03-04cancelled 2007-03-03
  2. W9JScancelled· E
    SIMMONS, JOHN ENCgranted 2001-02-06cancelled 2002-08-28

All historical holders

Every license row we've seen with the callsign KA4U, oldest first.

  • SIMMONS, JOHN E NC
    1994-10-25 → cancelled 2001-02-06
  • Geohagan, Clifford D AL
    2003-03-08 → cancelled 2005-03-04
  • Edwards, Lars T AL
    2017-01-11 active
← Back to KA4U License history →