Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1CAT callsign genealogy
Currently held by WILLIAMS, BRIAN E
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 KC1CAT's current licensee, walking backwards.
- COPLEY, PEGGY LFLgranted 2010-03-08cancelled 2010-03-27
Successor callsigns
Callsigns held now by people who previously held KC1CAT.
- WILLIAMS, BRIAN ECOgranted 2017-02-03
All historical holders
Every license row we've seen with the callsign KC1CAT, oldest first.
- WILLIAMS, BRIAN E CO2006-01-07 → cancelled 2007-03-16
- COPLEY, PEGGY L AZ2010-03-27 → cancelled 2022-03-29