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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

K4MGM callsign genealogy

Currently held by MASSEY, M MADELIN C

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 K4MGM's current licensee, walking backwards.

  1. K7TEBcancelled· E
    COLD, SHERMAN JNCgranted 2018-05-15cancelled 2019-11-08
  2. KI7RECcancelled· E
    COLD, SHERMAN JUTgranted 2017-10-30cancelled 2018-05-15

Successor callsigns

Callsigns held now by people who previously held K4MGM.

  1. K7SJCactive· E
    COLD, SHERMAN JUTgranted 2025-01-22

All historical holders

Every license row we've seen with the callsign K4MGM, oldest first.

  • MASSEY, M MADELIN C FL
    2006-04-04 → cancelled 2018-04-05
  • COLD, SHERMAN J UT
    2019-11-08 → cancelled 2025-01-22
← Back to K4MGM License history →