Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4DC callsign genealogy
Currently held by Olson, Richard 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 KO4DC's current licensee, walking backwards.
- N4YKHno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KO4DC.
No current licensee on record previously held this callsign.