Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4SJ callsign genealogy
Currently held by SOTO, PABLO
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 KP4SJ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KP4SJ.
No current licensee on record previously held this callsign.