Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9JMS callsign genealogy
Currently held by Sokol, John M
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 K9JMS's current licensee, walking backwards.
- Sokol, John MILgranted 1995-09-07cancelled 2003-12-09
Successor callsigns
Callsigns held now by people who previously held K9JMS.
- SETZLER, JOHN MNCgranted 2010-08-17cancelled 2015-03-10
All historical holders
Every license row we've seen with the callsign K9JMS, oldest first.
- SETZLER, JOHN M NC1999-01-28 → cancelled 2000-11-10
- Sokol, John M FL2023-09-12 active