Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC2DF callsign genealogy
Currently held by IMAIZUMI, KOSHI
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 AC2DF's current licensee, walking backwards.
- IMAIZUMI, KOSHINYgranted 2010-01-27cancelled 2010-04-21
Successor callsigns
Callsigns held now by people who previously held AC2DF.
- IMAIZUMI, KOSHINYgranted 2020-04-16