Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KFF callsign genealogy
Currently held by THOMPSON, CLEALON E
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 K4KFF's current licensee, walking backwards.
- ROBERTS, BRIAN BFLgranted 2014-08-18cancelled 2014-12-16
Successor callsigns
Callsigns held now by people who previously held K4KFF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KFF, oldest first.
- THOMPSON, CLEALON E SC1996-11-04 → cancelled 2008-11-05
- ROBERTS, BRIAN B FL2024-10-12 active