Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1VTO callsign genealogy
Currently held by Thongsuk, Khumron
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 KB1VTO's current licensee, walking backwards.
- Thongsuk, KhumronNHgranted 2010-12-23cancelled 2011-05-18
Successor callsigns
Callsigns held now by people who previously held KB1VTO.
- Thongsuk, KhumronARgranted 2020-09-24