Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4GTM callsign genealogy
Currently held by BRANDT, DONALD H
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 K4GTM's current licensee, walking backwards.
- McDonald, Guy TGAgranted 2007-02-08cancelled 2007-11-27
Successor callsigns
Callsigns held now by people who previously held K4GTM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GTM, oldest first.
- BRANDT, DONALD H NC1995-01-26 → cancelled 2007-01-27
- McDonald, Guy T GA2017-09-15 active