Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4DFX callsign genealogy
Currently held by MARTIN, WILLIAM A
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 W4DFX's current licensee, walking backwards.
- MARTIN, WILLIAM AVAgranted 1991-08-06cancelled 2001-04-03
Successor callsigns
Callsigns held now by people who previously held W4DFX.
No current licensee on record previously held this callsign.