Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4OCT callsign genealogy
Currently held by CARDOSO, OCTAVIO M
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 KO4OCT's current licensee, walking backwards.
- CARDOSO, OCTAVIO MFLgranted 2020-07-01cancelled 2020-07-21
Successor callsigns
Callsigns held now by people who previously held KO4OCT.
No current licensee on record previously held this callsign.