Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1JSO callsign genealogy
Currently held by Sole Jr, John 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 N1JSO's current licensee, walking backwards.
- Sole Jr, John RMNgranted 2016-04-01cancelled 2017-07-07
Successor callsigns
Callsigns held now by people who previously held N1JSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1JSO, oldest first.
- MANNER, STEVEN K CT1991-07-23 → cancelled 2003-07-24
- Sole Jr, John R MN2017-07-07 active