Confidence: Medium · Source: FCC ULS · As of 2026-09-15
W4WDT callsign genealogy
Currently held by THORNTON, WILLIAM D
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 W4WDT's current licensee, walking backwards.
- THORNTON, WILLIAM DGAgranted 2004-02-09cancelled 2004-06-25
Successor callsigns
Callsigns held now by people who previously held W4WDT.
No current licensee on record previously held this callsign.