Confidence: Medium · Source: FCC ULS · As of 2026-10-24
KF6C callsign genealogy
Currently held by Yamagata, Hirotaka
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 KF6C's current licensee, walking backwards.
- Yamagata, HirotakaCAgranted 2025-12-03cancelled 2026-09-11
Successor callsigns
Callsigns held now by people who previously held KF6C.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF6C, oldest first.
- COMER, BRIAN D NY2014-06-30 → cancelled 2026-07-16
- Yamagata, Hirotaka CA2026-09-11 active