Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6BCT callsign genealogy
Currently held by GUTHLEBEN, FRANCIS L
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 K6BCT's current licensee, walking backwards.
- Tompkins, Bradley CCAgranted 2016-08-11cancelled 2016-08-30
Successor callsigns
Callsigns held now by people who previously held K6BCT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6BCT, oldest first.
- GUTHLEBEN, FRANCIS L CA1995-09-25 → cancelled 2007-09-26
- Tompkins, Bradley C CA2026-08-07 active