Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NF1X callsign genealogy
Currently held by MUGNAI, ROBERT
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 NF1X's current licensee, walking backwards.
- Fenster, Neal SOHgranted 2013-10-17cancelled 2014-07-08
Successor callsigns
Callsigns held now by people who previously held NF1X.
- Da Silva, ClaudioCAgranted 2012-06-16cancelled 2012-11-24
All historical holders
Every license row we've seen with the callsign NF1X, oldest first.
- MUGNAI, ROBERT RI1996-04-15 → cancelled 2008-04-16
- Da Silva, Claudio CA2008-08-01 → cancelled 2012-06-16
- Fenster, Neal S OH2024-07-02 active