Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0FRI callsign genealogy
Currently held by Yamada, Keizo
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 K0FRI's current licensee, walking backwards.
- Yamada, KeizoMPgranted 2008-09-25cancelled 2009-04-28
Successor callsigns
Callsigns held now by people who previously held K0FRI.
No current licensee on record previously held this callsign.