Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4GIO callsign genealogy
Currently held by Martinez, Giovanni 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 KO4GIO's current licensee, walking backwards.
- Martinez, Giovanni AFLgranted 2017-07-24cancelled 2017-08-11
Successor callsigns
Callsigns held now by people who previously held KO4GIO.
No current licensee on record previously held this callsign.