Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4SGO callsign genealogy
Currently held by GALLARDO OYOLA, SAMUEL F
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 KP4SGO's current licensee, walking backwards.
- GALLARDO OYOLA, SAMUEL FPRgranted 2020-11-16cancelled 2021-01-05
Successor callsigns
Callsigns held now by people who previously held KP4SGO.
No current licensee on record previously held this callsign.