Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS7U callsign genealogy
Currently held by RUZICKA, MICHAEL F
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 KS7U's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KS7U.
- RUZICKA, MICHAEL FMTgranted 2005-07-16cancelled 2006-01-07
All historical holders
Every license row we've seen with the callsign KS7U, oldest first.
- RUZICKA, MICHAEL F MT1997-01-13 → cancelled 2005-07-16
- Gormley, Robert W AZ2017-07-11 active