Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7MML callsign genealogy
Currently held by DU FOUR, MICHAEL 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 N7MML's current licensee, walking backwards.
- DuFour, Michael RNVgranted 2016-02-23cancelled 2016-11-15
Successor callsigns
Callsigns held now by people who previously held N7MML.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7MML, oldest first.
- DU FOUR, MICHAEL J WA1992-06-16 → cancelled 2004-06-17
- DuFour, Michael R NV2016-11-15 active