Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6JSO callsign genealogy
Currently held by Byler, Jesse D
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 K6JSO's current licensee, walking backwards.
- TKACHEV, ANTONCAgranted 2025-02-04cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held K6JSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6JSO, oldest first.
- Byler, Jesse D CA2007-03-20 → cancelled 2019-03-21
- TKACHEV, ANTON CA2025-03-04 active