Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4GT callsign genealogy
Currently held by Kellerman, John 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 KB4GT's current licensee, walking backwards.
- Kellerman, John MGAgranted 2016-11-04cancelled 2021-12-14
Successor callsigns
Callsigns held now by people who previously held KB4GT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4GT, oldest first.
- CRISSMAN, DAVID N GA2008-07-16 → cancelled 2020-07-21
- Kellerman, John M GA2021-12-14 active