Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1FSM callsign genealogy
Currently held by CHURIN, JOHN M
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 N1FSM's current licensee, walking backwards.
- Mailloux, Brian ARIgranted 2011-08-30cancelled 2012-06-29
Successor callsigns
Callsigns held now by people who previously held N1FSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1FSM, oldest first.
- CHURIN, JOHN M NH1988-05-24 → cancelled 2000-05-25
- Mailloux, Brian A RI2022-04-05 active