Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB6YSJ callsign genealogy
Currently held by COOPER III, CHARLES B
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 KB6YSJ's current licensee, walking backwards.
- SABIN, BURLEIGH ECAgranted 2011-04-29cancelled 2011-05-17
Successor callsigns
Callsigns held now by people who previously held KB6YSJ.
- COOPER III, CHARLES BCAgranted 2018-11-14
All historical holders
Every license row we've seen with the callsign KB6YSJ, oldest first.
- COOPER III, CHARLES B CA2000-03-14 → cancelled 2008-12-20
- SABIN, BURLEIGH E CA2011-05-17 → cancelled 2023-05-18