Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KO4GMU callsign genealogy
Currently held by Chapman, Bryan G
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 KO4GMU'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 KO4GMU.
- Chapman, Bryan GVAgranted 2023-06-09