Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WI0S callsign genealogy
Currently held by Cook, Kieth J
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 WI0S's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WI0S.
- CARTWRIGHT, CHARLES CHIgranted 2017-07-21
All historical holders
Every license row we've seen with the callsign WI0S, oldest first.
- Cook, Kieth J MN2026-04-14 active
- —— → cancelled 1997-10-14