Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OP callsign genealogy
Currently held by McCarthy, John L
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 K4OP's current licensee, walking backwards.
- McCarthy, John LKYgranted 2002-11-14cancelled 2003-04-01
Successor callsigns
Callsigns held now by people who previously held K4OP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4OP, oldest first.
- WYMAN, BRUCE D FL1994-10-18 → cancelled 1998-08-23
- McCarthy, John L KY2023-03-07 active