Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG7CH callsign genealogy
Currently held by KOOIMAN, WILLIAM C
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 KG7CH's current licensee, walking backwards.
- KA0IVAno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KG7CH.
- Kooiman, William CWAgranted 2000-03-24cancelled 2001-02-17