Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO1RKO callsign genealogy
Currently held by Oswald, Robert K
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 KO1RKO's current licensee, walking backwards.
- OSWALD, ROBERT KVAgranted 2025-04-12cancelled 2025-05-02
Successor callsigns
Callsigns held now by people who previously held KO1RKO.
No current licensee on record previously held this callsign.