Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WO8HIO callsign genealogy
Currently held by MAUMEE VALLEY CONTEST CLUB
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 WO8HIO's current licensee, walking backwards.
- KD8BTWcancelledMaumee Valley Contest ClubOHgranted 2005-06-22cancelled 2005-07-12
Successor callsigns
Callsigns held now by people who previously held WO8HIO.
- W8OHactiveMAUMEE VALLEY CONTEST CLUBOHgranted 2015-04-14
All historical holders
Every license row we've seen with the callsign WO8HIO, oldest first.
- MAUMEE VALLEY CONTEST CLUB OH1998-06-18 → cancelled 2005-02-26
- Maumee Valley Contest Club OH2016-04-11 active