Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1ZTT callsign genealogy
Currently held by YONEYAMA, HARUSUKE
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 W1ZTT's current licensee, walking backwards.
- Yoneyama, HarusukeMAgranted 2012-03-27cancelled 2012-04-14
Successor callsigns
Callsigns held now by people who previously held W1ZTT.
No current licensee on record previously held this callsign.