Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WI0O callsign genealogy
Currently held by Ihde, Sean M
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 WI0O's current licensee, walking backwards.
- Ihde, Sean MMNgranted 2020-09-15cancelled 2022-04-12
Successor callsigns
Callsigns held now by people who previously held WI0O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WI0O, oldest first.
- WAGENAAR, JAKE IA2012-12-03 → cancelled 2019-11-19
- Ihde, Sean M MN2022-04-12 active