Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5CSJ callsign genealogy
Currently held by BRINGIER, WILLIAM D
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 K5CSJ's current licensee, walking backwards.
- Martel, MatthewNMgranted 2025-07-22cancelled 2025-08-12
Successor callsigns
Callsigns held now by people who previously held K5CSJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5CSJ, oldest first.
- BRINGIER, WILLIAM D TX2008-10-07 → cancelled 2020-11-07
- Martel, Matthew P NM2025-08-12 active