Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6ISA callsign genealogy
Currently held by Simsih, Stefan
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 K6ISA's current licensee, walking backwards.
- Simsih, StefanCAgranted 2014-05-13cancelled 2014-06-07
Successor callsigns
Callsigns held now by people who previously held K6ISA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6ISA, oldest first.
- HEALEY, JAMES F CA2002-04-03 → cancelled 2007-03-28
- Simsih, Stefan CA2024-03-12 active