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

KD4MC callsign genealogy

Currently held by CALLAM, MICHAEL E

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 KD4MC's current licensee, walking backwards.

  1. KD4UJCcancelled· E
    CALLAM, MICHAEL ENCgranted 2008-08-15cancelled 2014-12-02
  2. W4JRZactive· G
    Zimmerman, Justin RTNgranted 2025-08-23
  3. KM4MPJcancelled· G
    Zimmerman, Justin RTNgranted 2015-08-14cancelled 2015-09-15

Successor callsigns

Callsigns held now by people who previously held KD4MC.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KD4MC, oldest first.

  • HEIM, STEPHEN F AL
    1995-11-28 → cancelled 2007-11-29
  • CALLAM, MICHAEL E NC
    2024-11-13 active
← Back to KD4MC License history →