Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5WX callsign genealogy
Currently held by Bierner, Laurence J
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 K5WX's current licensee, walking backwards.
- Bierner, Laurence JAZgranted 2020-05-27cancelled 2024-11-22
Successor callsigns
Callsigns held now by people who previously held K5WX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5WX, oldest first.
- ZIMMERMANN, KEITH A TX2012-09-27 → cancelled 2022-12-20
- Bierner, Laurence J AZ2024-11-22 active