Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ9O callsign genealogy
Currently held by Wisconsin Contest Club
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 KZ9O's current licensee, walking backwards.
- KC9FYJcancelledMidwest WWYCWIgranted 2004-04-26cancelled 2004-06-16
Successor callsigns
Callsigns held now by people who previously held KZ9O.
- DYLE, RANDALL EWIgranted 2026-08-13