Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4GMA callsign genealogy
Currently held by ACHTERHOF, GORDON M
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 K4GMA's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4GMA.
- ACHTERHOF, GORDON MSCgranted 2021-02-17
All historical holders
Every license row we've seen with the callsign K4GMA, oldest first.
- ACHTERHOF, GORDON M SC1998-11-13 → cancelled 2001-05-15
- Cantrell, Stephen B TN2017-02-03 active