Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4RJX callsign genealogy
Currently held by Alexander, Zachary W
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 KO4RJX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KO4RJX.
No current licensee on record previously held this callsign.