Confidence: Medium · Source: FCC ULS · As of 2026-10-24
AD9JO callsign genealogy
Currently held by Aschenbrenner, 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 AD9JO's current licensee, walking backwards.
- Aschenbrenner, MatthewINgranted 2026-08-27cancelled 2026-09-10
Successor callsigns
Callsigns held now by people who previously held AD9JO.
No current licensee on record previously held this callsign.