Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD3J callsign genealogy
Currently held by FELDMEIER, DAVID C
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 AD3J's current licensee, walking backwards.
- BRETT JR, MARTIN JDEgranted 1997-03-20cancelled 2006-05-26
Successor callsigns
Callsigns held now by people who previously held AD3J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AD3J, oldest first.
- FELDMEIER, DAVID C NJ1996-04-03 → cancelled 2006-03-23
- BRETT JR, MARTIN J DE2026-04-04 active