Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0WRB callsign genealogy
Currently held by Boyd, William R
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 K0WRB's current licensee, walking backwards.
- Bidermann, William RCAgranted 2019-03-26cancelled 2025-06-17
Successor callsigns
Callsigns held now by people who previously held K0WRB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0WRB, oldest first.
- Boyd, William R MO2011-06-03 → cancelled 2023-06-06
- Bidermann, William R CA2025-06-17 active