Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4RXU callsign genealogy
Currently held by Doan, Donald P
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 KO4RXU's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KO4RXU.
- Doan, Donald PFLgranted 2021-08-24cancelled 2022-03-04