Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO7KO callsign genealogy
Currently held by Ohlsen, Ken A
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 KO7KO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KO7KO.
No current licensee on record previously held this callsign.