Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4GFS callsign genealogy
Currently held by PAPPAS, THOMAS 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 K4GFS's current licensee, walking backwards.
- Fattinger, GernotFLgranted 2015-10-19cancelled 2015-11-24
Successor callsigns
Callsigns held now by people who previously held K4GFS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GFS, oldest first.
- PAPPAS, THOMAS W CA1997-01-29 → cancelled 2009-01-30
- Fattinger, Gernot FL2015-11-24 active