Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0JSM callsign genealogy
Currently held by BOSWELL, STEPHEN 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 N0JSM's current licensee, walking backwards.
- Markiewicz, Joseph SMOgranted 2014-05-19cancelled 2014-06-10
Successor callsigns
Callsigns held now by people who previously held N0JSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0JSM, oldest first.
- BOSWELL, STEPHEN R MN1988-10-18 → cancelled 2000-10-19
- MARKIEWICZ, JOSEPH S MO2025-05-31 active