Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4WSO callsign genealogy
Currently held by Mullis, Arthur R
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 KO4WSO's current licensee, walking backwards.
- Mullis, Arthur RFLgranted 2021-11-10cancelled 2021-11-30
Successor callsigns
Callsigns held now by people who previously held KO4WSO.
No current licensee on record previously held this callsign.