Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DWD callsign genealogy
Currently held by DUFFRIN, DAVID W
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 K4DWD's current licensee, walking backwards.
- DUFFRIN, DAVID WNCgranted 1995-09-14cancelled 2000-01-11
Successor callsigns
Callsigns held now by people who previously held K4DWD.
No current licensee on record previously held this callsign.