Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9HIO callsign genealogy
Currently held by MATSUOKA, EARL
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 W9HIO's current licensee, walking backwards.
- Matsuoka, JoeWAgranted 2024-12-24cancelled 2025-01-11
Successor callsigns
Callsigns held now by people who previously held W9HIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9HIO, oldest first.
- MATSUOKA, EARL IL1994-05-17 → cancelled 2006-05-18
- Matsuoka, Joe WA2025-01-11 active