Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO9NZO callsign genealogy
Currently held by McFall, Jerry
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 KO9NZO's current licensee, walking backwards.
- McFall, JerryINgranted 2021-03-11cancelled 2025-04-18
Successor callsigns
Callsigns held now by people who previously held KO9NZO.
- McFall, JerryINgranted 2026-06-23