uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K4DTM callsign genealogy

Currently held by CAMPBELL, THEODORE G

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 K4DTM's current licensee, walking backwards.

  1. AI4SUcancelled· E
    MULL, DERRICK TTNgranted 2004-04-05cancelled 2011-03-29
  2. KI4EXGcancelled· E
    MULL, DERRICK TTNgranted 2004-04-05cancelled 2007-01-08

Successor callsigns

Callsigns held now by people who previously held K4DTM.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4DTM, oldest first.

  • CAMPBELL, THEODORE G FL
    1993-01-12 → cancelled 2005-01-13
  • MULL, DERRICK T MS
    2021-02-24 active
← Back to K4DTM License history →