Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF6KSF callsign genealogy
Currently held by ARBALLO, JON 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 KF6KSF's current licensee, walking backwards.
- ARBALLO, JON MCAgranted 2022-05-12cancelled 2022-06-15
Successor callsigns
Callsigns held now by people who previously held KF6KSF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF6KSF, oldest first.
- ARBALLO, JON M CA1997-04-30 → cancelled 2009-05-01
- ARBALLO, JON M CA2022-06-15 active