Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO9Y callsign genealogy
Currently held by OSBORNE, KEVIN P
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 KO9Y's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KO9Y.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO9Y, oldest first.
- Thomas, Mitchell P CA2012-03-27 → cancelled 2024-03-28
- OSBORNE, KEVIN P IL2024-04-16 active