Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9YX callsign genealogy
Currently held by MC CLAIN, JOHN W
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 K9YX's current licensee, walking backwards.
- Lorenzen, Thomas DILgranted 2009-04-17cancelled 2013-02-26
Successor callsigns
Callsigns held now by people who previously held K9YX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9YX, oldest first.
- MC CLAIN, JOHN W IN2001-02-06 → cancelled 2013-02-07
- Lorenzen, Thomas D IL2023-01-18 active