Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4DHX callsign genealogy
Currently held by Mauro, John B
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 W4DHX's current licensee, walking backwards.
- Mauro, John BFLgranted 2004-07-09cancelled 2008-12-16
Successor callsigns
Callsigns held now by people who previously held W4DHX.
No current licensee on record previously held this callsign.