Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4CH callsign genealogy
Currently held by KOCH, GERALD 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 KO4CH's current licensee, walking backwards.
- KOCH, GERALD FNCgranted 2021-12-03
Successor callsigns
Callsigns held now by people who previously held KO4CH.