Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO0J callsign genealogy
Currently held by OSBORNE, JARED R
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 KO0J's current licensee, walking backwards.
- OSBORNE, JARED RMOgranted 2023-08-30cancelled 2023-11-28
Successor callsigns
Callsigns held now by people who previously held KO0J.
- Cornell, JonathanCOgranted 2021-10-19
All historical holders
Every license row we've seen with the callsign KO0J, oldest first.
- STRATMAN, CLARENCE A MO2009-05-12 → cancelled 2021-08-06
- Cornell, Jonathan CO2021-09-10 → cancelled 2021-10-19
- OSBORNE, JARED R MO2023-11-28 active