Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9CAZ callsign genealogy
Currently held by Guzy, Casimir
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 KC9CAZ's current licensee, walking backwards.
- Guzy, Casimir JILgranted 2017-01-23cancelled 2017-02-11
Successor callsigns
Callsigns held now by people who previously held KC9CAZ.
- Shotliff, Terry DINgranted 2012-07-10cancelled 2024-07-31
All historical holders
Every license row we've seen with the callsign KC9CAZ, oldest first.
- Shotliff, Terry D IN2002-07-01 → cancelled 2002-07-30
- Guzy, Casimir IL2017-02-11 active