Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9JDB callsign genealogy
Currently held by DETLEF, MICHAEL J
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 N9JDB's current licensee, walking backwards.
- Ray Jr, Russell JALgranted 2013-10-30cancelled 2021-10-30
Successor callsigns
Callsigns held now by people who previously held N9JDB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9JDB, oldest first.
- DETLEF, MICHAEL J IN1993-12-14 → cancelled 2005-12-15
- Ray Jr, Russell J AL2021-10-30 active