Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8TBS callsign genealogy
Currently held by Siegenthaler, Timothy B
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 K8TBS's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K8TBS.
- Siegenthaler, Timothy BOHgranted 2022-03-26cancelled 2022-12-02
All historical holders
Every license row we've seen with the callsign K8TBS, oldest first.
- Siegenthaler, Timothy B OH2014-12-24 → cancelled 2022-03-26
- Siegenthaler, Timothy B OH2022-12-02 active