Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0BFB callsign genealogy
Currently held by Berg, William
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 K0BFB's current licensee, walking backwards.
- Berg, WilliamCOgranted 2023-02-14cancelled 2023-03-04
Successor callsigns
Callsigns held now by people who previously held K0BFB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0BFB, oldest first.
- Heidenreich, Richard C AZ2003-12-30 → cancelled 2015-12-31
- Berg, William CO2023-03-04 active