Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS9X callsign genealogy
Currently held by HIRSCH, FRANK J
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 KS9X's current licensee, walking backwards.
- Franz, Christopher GILgranted 2019-07-01cancelled 2019-08-23
Successor callsigns
Callsigns held now by people who previously held KS9X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KS9X, oldest first.
- HIRSCH, FRANK J IL2007-04-05 → cancelled 2019-05-30
- Franz, Christopher G IL2019-08-23 active