Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4M callsign genealogy
Currently held by WALTON, THOMAS 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 KZ4M's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KZ4M.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KZ4M, oldest first.
- THARP, GARY G FL2005-05-24 → cancelled 2017-05-25
- WALTON, THOMAS E SC2017-06-13 active