Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6TFD callsign genealogy
Currently held by THOMPSON, 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 K6TFD's current licensee, walking backwards.
- THOMPSON, JOHN MCAgranted 2004-10-05cancelled 2008-08-05
Successor callsigns
Callsigns held now by people who previously held K6TFD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6TFD, oldest first.
- CARMAN, FRANKLYN K CA1994-04-05 → cancelled 2006-04-06
- THOMPSON, JOHN M CA2018-06-06 active