Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4DBC callsign genealogy
Currently held by LOPEZ DUFOUR, MARIANO
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 N4DBC's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4DBC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4DBC, oldest first.
- LOPEZ DUFOUR, MARIANO FL1997-02-18 → cancelled 2006-01-19
- COX, DAVID B VA2026-05-12 active