Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7JMS callsign genealogy
Currently held by BYRNE, SEAN P
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 KC7JMS's current licensee, walking backwards.
- SKAINS, JOSHUA MUTgranted 2018-06-27cancelled 2018-07-17
Successor callsigns
Callsigns held now by people who previously held KC7JMS.
- BYRNE, SEAN PWAgranted 1999-02-01cancelled 1999-12-21
All historical holders
Every license row we've seen with the callsign KC7JMS, oldest first.
- SKAINS, JOSHUA M UT2018-07-17 active
- BYRNE, SEAN P— → cancelled 1999-02-01