Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4OC callsign genealogy
Currently held by Oldham County Amateur Radio Club
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 KY4OC's current licensee, walking backwards.
- KR4JGVcancelledOldham County Amateur Radio ClubKYgranted 2026-01-30cancelled 2026-03-17
Successor callsigns
Callsigns held now by people who previously held KY4OC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KY4OC, oldest first.
- OLDHAM COUNTY AMATEUR RADIO CLUB KY2012-09-01 → cancelled 2024-07-31
- Oldham County Amateur Radio Club KY2026-03-17 active