Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5CSR callsign genealogy
Currently held by Bluetooth Amateur Radio Club Of CSR
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 K5CSR's current licensee, walking backwards.
- Truax, Alex SNCgranted 2023-02-25cancelled 2023-03-17
Successor callsigns
Callsigns held now by people who previously held K5CSR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CSR, oldest first.
- Bluetooth Amateur Radio Club Of CSR TX2004-10-19 → cancelled 2016-10-20
- Truax, Alex S NC2023-03-17 active