Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO1CCO callsign genealogy
Currently held by Holland Jr, Joel 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 KO1CCO's current licensee, walking backwards.
- Holland Jr, Joel CNCgranted 2020-08-31cancelled 2020-09-22
Successor callsigns
Callsigns held now by people who previously held KO1CCO.
No current licensee on record previously held this callsign.