Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1JMS callsign genealogy
Currently held by MARSH, JOSEPH H
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 N1JMS's current licensee, walking backwards.
- Schwerkoske, James MOHgranted 2007-01-19cancelled 2007-05-22
Successor callsigns
Callsigns held now by people who previously held N1JMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1JMS, oldest first.
- MARSH, JOSEPH H FL1994-02-22 → cancelled 2006-02-23
- Schwerkoske, James M FL2017-02-28 active