Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MMA callsign genealogy
Currently held by A Alvarez, Michael 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 N4MMA's current licensee, walking backwards.
- Alvarez, Michael AFLgranted 2022-11-16cancelled 2022-12-06
Successor callsigns
Callsigns held now by people who previously held N4MMA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4MMA, oldest first.
- RUMFELT, LOUISE H NC2005-02-18 → cancelled 2017-05-17
- A Alvarez, Michael A FL2022-12-06 active