Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N6SFM callsign genealogy
Currently held by TROUTT, FRANK R
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 N6SFM's current licensee, walking backwards.
- Mondelli, CesareSCgranted 2008-05-20cancelled 2008-06-14
Successor callsigns
Callsigns held now by people who previously held N6SFM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6SFM, oldest first.
- TROUTT, FRANK R CA1991-08-20 → cancelled 2003-08-21
- Mondelli, Cesare SC2018-05-19 active