Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4MKX callsign genealogy
Currently held by DORNBACK, TOM
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 K4MKX's current licensee, walking backwards.
- DORNBACK, TOMFLgranted 2018-05-01cancelled 2023-02-24
Successor callsigns
Callsigns held now by people who previously held K4MKX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MKX, oldest first.
- BEACH, EDWARD B VA1994-11-21 → cancelled 2006-11-22
- DORNBACK, TOM FL2023-02-24 active