Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6ISO callsign genealogy
Currently held by GUTIERREZ, MICHAEL L
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 K6ISO's current licensee, walking backwards.
- KHAYAT, ARTHURCAgranted 2016-01-25cancelled 2016-05-20
Successor callsigns
Callsigns held now by people who previously held K6ISO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6ISO, oldest first.
- GUTIERREZ, MICHAEL L CA1995-06-06 → cancelled 2007-06-07
- Khayat, Arthur CA2016-05-20 active