Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6PRO callsign genealogy
Currently held by Perches, 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 K6PRO's current licensee, walking backwards.
- Perches, WilliamCAgranted 2022-10-19cancelled 2022-11-08
Successor callsigns
Callsigns held now by people who previously held K6PRO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6PRO, oldest first.
- PACIFIC RAILCARS OPERATORS ARC CA2009-05-29 → cancelled 2021-06-11
- Perches, William CA2022-11-08 active