Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4AO callsign genealogy
Currently held by McAllister, Christopher 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 AJ4AO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AJ4AO.
No current licensee on record previously held this callsign.