Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4GMZ callsign genealogy
Currently held by Grimes, Gregery A
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 K4GMZ's current licensee, walking backwards.
- Grimes, Gregery AKYgranted 2025-12-23cancelled 2026-02-13
Successor callsigns
Callsigns held now by people who previously held K4GMZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GMZ, oldest first.
- TUMEY, LAWRENCE F FL1998-10-27 → cancelled 2010-10-28
- Grimes, Gregery A KY2026-02-13 active