Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WO4DGM callsign genealogy
Currently held by Mazzella Jr, David G
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 WO4DGM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WO4DGM.
No current licensee on record previously held this callsign.