Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9TBX callsign genealogy
Currently held by BIRCH, ALVIN 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 K9TBX's current licensee, walking backwards.
- Bishop, Thomas AINgranted 2015-05-06cancelled 2016-02-26
Successor callsigns
Callsigns held now by people who previously held K9TBX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9TBX, oldest first.
- BIRCH, ALVIN L IL2000-08-24 → cancelled 2012-08-22
- Bishop, Thomas A IN2016-02-26 active