Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA4UJ callsign genealogy
Currently held by ROBERTSON, BRIAN D
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 AA4UJ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AA4UJ.
No current licensee on record previously held this callsign.