Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4TBI callsign genealogy
Currently held by Linatoc, Leonil Vinzon A
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 KO4TBI'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 KO4TBI.
- Linatoc, Leonil Vinzon AFLgranted 2021-10-13