Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9KAO callsign genealogy
Currently held by Kao, 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 K9KAO's current licensee, walking backwards.
- Kao, HenryCAgranted 2010-03-30cancelled 2010-12-03
Successor callsigns
Callsigns held now by people who previously held K9KAO.
No current licensee on record previously held this callsign.