Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC7WI callsign genealogy
Currently held by Koyama, Hiroki
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 AC7WI's current licensee, walking backwards.
- Koyama, HirokiWAgranted 2001-05-08cancelled 2002-11-18
Successor callsigns
Callsigns held now by people who previously held AC7WI.
- Koyama, HirokiWAgranted 2022-09-17