Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9IXO callsign genealogy
Currently held by OSTER, WILLIAM
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 K9IXO's current licensee, walking backwards.
- TAVENDER, RICHARD EILgranted 2014-03-13cancelled 2015-11-17
Successor callsigns
Callsigns held now by people who previously held K9IXO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9IXO, oldest first.
- OSTER, WILLIAM IN1994-05-17 → cancelled 2006-05-18
- TAVENDER, RICHARD E IL2015-11-17 active