Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NA1SA callsign genealogy
Currently held by Kosmos Radio Club International
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 NA1SA's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NA1SA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NA1SA, oldest first.
- Kosmos Radio Club International NY2006-07-25 → cancelled 2018-07-26
- Troup, Marlin "Loon" A PA2018-08-17 active