Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4OZ callsign genealogy
Currently held by Osborn, Larry L
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 KY4OZ's current licensee, walking backwards.
- Osborn, Larry LKYgranted 2007-10-15cancelled 2009-03-10
Successor callsigns
Callsigns held now by people who previously held KY4OZ.
No current licensee on record previously held this callsign.