Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO1OK callsign genealogy
Currently held by OKeefe, Denis F
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 KO1OK's current licensee, walking backwards.
- OKeefe, Denis FPAgranted 2017-03-13cancelled 2017-04-01
Successor callsigns
Callsigns held now by people who previously held KO1OK.
No current licensee on record previously held this callsign.