Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9SY callsign genealogy
Currently held by YAMAMOTO, SATORU
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 W9SY's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9SY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9SY, oldest first.
- SANSONE, SALVATORE A IL2006-11-23 → cancelled 2019-02-13
- YAMAMOTO, SATORU CA2019-03-05 active