Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7OK callsign genealogy
Currently held by BUTLER, DURWOOD S
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 K7OK's current licensee, walking backwards.
- KD7VNBcancelledParadise Amateur Radio ClubNVgranted 2003-04-23cancelled 2003-05-20
Successor callsigns
Callsigns held now by people who previously held K7OK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7OK, oldest first.
- BUTLER, DURWOOD S NV1994-04-12 → cancelled 2000-09-06
- PARADISE AMATEUR RADIO CLUB UT2023-06-07 active