Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6MJD callsign genealogy
Currently held by Duffy, Mike J
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 W6MJD's current licensee, walking backwards.
- DUFFY, MICHAEL Jcancelled 1999-05-27
Successor callsigns
Callsigns held now by people who previously held W6MJD.
No current licensee on record previously held this callsign.