Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4SM callsign genealogy
Currently held by DYER, ROBERT E
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 AJ4SM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AJ4SM.
No current licensee on record previously held this callsign.