Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9ZY callsign genealogy
Currently held by Klus, Shawn
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 AC9ZY's current licensee, walking backwards.
- Klus, ShawnINgranted 2021-11-16cancelled 2022-03-15
Successor callsigns
Callsigns held now by people who previously held AC9ZY.
No current licensee on record previously held this callsign.