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

WM4H callsign genealogy

Currently held by JOHNSON, LARRY B

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 WM4H's current licensee, walking backwards.

  1. AF4WCcancelled· E
    Switzer, Don RALgranted 1997-01-29cancelled 2000-08-11
  2. KU4BFcancelled· A
    SWITZER, DON RALgranted 1997-01-29cancelled 2000-06-02
  3. KE4ZQT
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held WM4H.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign WM4H, oldest first.

  • JOHNSON, LARRY B KY
    1988-06-21 → cancelled 2000-06-22
  • Switzer, Don R AL
    2020-06-09 active
← Back to WM4H License history →