Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9AYZ callsign genealogy
Currently held by RUDD, JOHN A
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 K9AYZ's current licensee, walking backwards.
- Borucki, GregoryILgranted 2013-05-16cancelled 2020-11-14
Successor callsigns
Callsigns held now by people who previously held K9AYZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9AYZ, oldest first.
- RUDD, JOHN A IL1996-07-11 → cancelled 2008-07-12
- Borucki, Gregory IL2020-11-14 active