Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4XO callsign genealogy
Currently held by AVILES TORO, JUAN C
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 KP4XO's current licensee, walking backwards.
- AVILES-TORO, JUAN CPAgranted 2013-05-03cancelled 2017-12-30
Successor callsigns
Callsigns held now by people who previously held KP4XO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4XO, oldest first.
- Rodriguez Melon, Saul PR2003-12-03 → cancelled 2016-02-23
- AVILES TORO, JUAN C PA2017-12-30 active