Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KT4IU callsign genealogy
Currently held by SHIMABUKU, NAOYA
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 KT4IU's current licensee, walking backwards.
- KF4FRDno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KT4IU.
No current licensee on record previously held this callsign.