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

KM4F callsign genealogy

Currently held by Heaton, Dennis R

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 KM4F's current licensee, walking backwards.

  1. AB4LXcancelled· E
    Heaton, Dennis RGAgranted 2011-11-19cancelled 2016-08-05
  2. AG4MCactive· E
    Warshel, Robert TMDgranted 2026-01-21
  3. KG6MGEcancelled· E
    Warshel, Robert TMDgranted 2012-05-25cancelled 2016-04-12

Successor callsigns

Callsigns held now by people who previously held KM4F.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KM4F, oldest first.

  • RODENHIZER III, BERNARD C VA
    2004-04-27 → cancelled 2016-07-16
  • Heaton, Dennis R GA
    2026-06-17 active
← Back to KM4F License history →