Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0OI callsign genealogy
Currently held by COOPER JR, JOHN
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 K0OI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K0OI.
No current licensee on record previously held this callsign.