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

K4FMZ callsign genealogy

Currently held by Imhoff, Donald J

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 K4FMZ's current licensee, walking backwards.

  1. KE4STBcancelled· T
    Imhoff, Donald JFLgranted 2004-01-23cancelled 2007-12-18
  2. W4FFGcancelled· T
    IMHOFF, DONALD JKYgranted 2003-06-20cancelled 2004-01-23

Successor callsigns

Callsigns held now by people who previously held K4FMZ.

  1. W5DONactive· G
    IMHOFF, DONALD JOKgranted 2026-04-04
← Back to K4FMZ License history →