Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0IJU callsign genealogy
Currently held by FRISBY, RONALD H
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 K0IJU's current licensee, walking backwards.
- Frisby, Don LWIgranted 2008-04-30cancelled 2008-05-24
Successor callsigns
Callsigns held now by people who previously held K0IJU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0IJU, oldest first.
- FRISBY, RONALD H MN1994-04-26 → cancelled 2006-04-27
- Frisby, Don L WI2018-04-11 active