Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4WDM callsign genealogy
Currently held by MOON, 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 W4WDM's current licensee, walking backwards.
- MOON, WILLIAM DGAgranted 2006-06-23cancelled 2008-02-01
Successor callsigns
Callsigns held now by people who previously held W4WDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4WDM, oldest first.
- MOORE, WILLIAM D NC1997-09-17 → cancelled 2001-11-07
- MOON, WILLIAM D GA2018-01-22 active