Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA9CQ callsign genealogy
Currently held by Ratza, Clifford 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 AA9CQ's current licensee, walking backwards.
- Karas, Mark AILgranted 2019-03-13cancelled 2024-02-09
Successor callsigns
Callsigns held now by people who previously held AA9CQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA9CQ, oldest first.
- Ratza, Clifford L IL2011-10-18 → cancelled 2024-01-03
- Karas, Mark A IL2024-02-09 active