Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO3ZDE callsign genealogy
Currently held by Gallardo, Leonardo
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 KO3ZDE's current licensee, walking backwards.
- Gallardo, LeonardoFLgranted 2024-07-25cancelled 2024-08-13
Successor callsigns
Callsigns held now by people who previously held KO3ZDE.
No current licensee on record previously held this callsign.