Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4GFX callsign genealogy
Currently held by MC CAIN, JIM W
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 K4GFX's current licensee, walking backwards.
- GUESS, DONALD DKYgranted 2018-04-03cancelled 2022-03-19
Successor callsigns
Callsigns held now by people who previously held K4GFX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GFX, oldest first.
- MC CAIN, JIM W KY2006-11-08 → cancelled 2019-02-12
- GUESS, DONALD D KY2022-03-19 active