Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9BRZ callsign genealogy
Currently held by Thorn, Stephen
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 K9BRZ's current licensee, walking backwards.
- Thorn, StephenCAgranted 2019-10-28cancelled 2019-11-16
Successor callsigns
Callsigns held now by people who previously held K9BRZ.
- Thorn, StephenCAgranted 2022-06-10
All historical holders
Every license row we've seen with the callsign K9BRZ, oldest first.
- MONTGOMERY, JACK L IL2005-07-14 → cancelled 2017-09-14
- Thorn, Stephen CA2019-11-16 → cancelled 2022-06-10