Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6YU callsign genealogy
Currently held by Sasabe, Yutaka
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 W6YU's current licensee, walking backwards.
- Sasabe, YutakaCAgranted 2026-02-26cancelled 2026-08-14
Successor callsigns
Callsigns held now by people who previously held W6YU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6YU, oldest first.
- COLLEGE OF SAN MATEO AMAT RAD CLB CA2014-07-29 → cancelled 2026-07-28
- Sasabe, Yutaka CA2026-08-14 active