Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4ON callsign genealogy
Currently held by Giese, Robert H
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 AJ4ON's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AJ4ON.
No current licensee on record previously held this callsign.