Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO6OQI callsign genealogy
Currently held by Mak, Shum Yi Henry
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 KO6OQI's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KO6OQI.
- Mak, Shum Yi HenryCAgranted 2026-07-29