Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AJ7DN callsign genealogy
Currently held by Constantine, Matthew
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 AJ7DN's current licensee, walking backwards.
- Constantine, MatthewORgranted 2025-02-13cancelled 2025-03-28
Successor callsigns
Callsigns held now by people who previously held AJ7DN.
No current licensee on record previously held this callsign.