Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4GCS callsign genealogy
Currently held by SIMPSON, GERAD
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 KO4GCS's current licensee, walking backwards.
- SIMPSON, GERADGAgranted 2020-01-21cancelled 2020-02-08
Successor callsigns
Callsigns held now by people who previously held KO4GCS.
- SIMPSON, GERADGAgranted 2021-09-28