Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3DUG callsign genealogy
Currently held by MARX, DOUGLAS
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 N3DUG's current licensee, walking backwards.
- MARX, DOUGLASPAgranted 2003-04-15cancelled 2011-01-25
Successor callsigns
Callsigns held now by people who previously held N3DUG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3DUG, oldest first.
- SCHRAMM, DAVID C MD1993-11-02 → cancelled 2005-11-03
- MARX, DOUGLAS NC2011-01-25 → cancelled 2023-01-26