Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W8AYD callsign genealogy
Currently held by Shishido, Masatoshi
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 W8AYD's current licensee, walking backwards.
- Shishido, MasatoshiHIgranted 2010-05-11cancelled 2010-07-13
Successor callsigns
Callsigns held now by people who previously held W8AYD.
- Shishido, MasatoshiHIgranted 2018-01-30