Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4USD callsign genealogy
Currently held by DOUCETTE, ARTHUR P
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 N4USD's current licensee, walking backwards.
- Williams, David JNCgranted 2025-06-10cancelled 2025-06-28
Successor callsigns
Callsigns held now by people who previously held N4USD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4USD, oldest first.
- DOUCETTE, ARTHUR P FL2008-09-18 → cancelled 2020-12-18
- Williams, David J NC2025-06-28 active