Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N6JSM callsign genealogy
Currently held by MCMARTIN, JOHN S
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 N6JSM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N6JSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6JSM, oldest first.
- MONTANARO, JOHN S CA2004-02-24 → cancelled 2016-02-25
- MCMARTIN, JOHN S CA2026-02-19 active