Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6TMS callsign genealogy
Currently held by Seidel, Thomas 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 K6TMS's current licensee, walking backwards.
- Seidel, ThomasCAgranted 2016-02-09cancelled 2016-07-12
Successor callsigns
Callsigns held now by people who previously held K6TMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6TMS, oldest first.
- Terman Ham Radio Electronics & Technology Club CA2004-06-22 → cancelled 2016-06-23
- Seidel, Thomas M NV2026-05-20 active