Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4XDW callsign genealogy
Currently held by Willoughby, David L
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 K4XDW's current licensee, walking backwards.
- Willoughby, David LTNgranted 2012-09-14cancelled 2012-10-10
Successor callsigns
Callsigns held now by people who previously held K4XDW.
No current licensee on record previously held this callsign.