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

K7DSM callsign genealogy

Currently held by MADISON, DARRYL S

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 K7DSM's current licensee, walking backwards.

  1. W1DSMcancelled· E
    McClimans, Daryl SORgranted 2024-03-09cancelled 2026-07-17
  2. AI7FQcancelled· E
    McClimans, Daryl SORgranted 2020-11-07cancelled 2024-03-09
  3. KA7MACcancelled· E
    McClimans, Daryl SORgranted 2020-11-07cancelled 2021-02-23
  4. KJ7RPFcancelled· T
    McClimans, Daryl SORgranted 2020-10-19cancelled 2020-11-07

Successor callsigns

Callsigns held now by people who previously held K7DSM.

  1. N7ARactive· E
    MADISON, DARRYL SWAgranted 2017-02-02

All historical holders

Every license row we've seen with the callsign K7DSM, oldest first.

  • MADISON, DARRYL S WA
    1998-03-03 → cancelled 2007-02-21
  • Messinger, David S ID
    2014-06-27 → cancelled 2026-06-30
  • McClimans, Daryl S OR
    2026-07-17 active
← Back to K7DSM License history →