Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4ZFX callsign genealogy
Currently held by Brown, Michael L
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 KO4ZFX's current licensee, walking backwards.
- Brown, Michael LKYgranted 2021-03-15cancelled 2021-04-02
Successor callsigns
Callsigns held now by people who previously held KO4ZFX.
No current licensee on record previously held this callsign.