Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7MMO callsign genealogy
Currently held by Feuerstein, Mark 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 N7MMO's current licensee, walking backwards.
- Feuerstein, Mark GWAgranted 2010-11-02cancelled 2010-12-10
Successor callsigns
Callsigns held now by people who previously held N7MMO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7MMO, oldest first.
- OSGOOD, PHILIP G OR1992-01-07 → cancelled 2004-01-08
- Feuerstein, Mark G WA2020-09-22 active