Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4AZ callsign genealogy
Currently held by Llona, Antonio
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 KP4AZ's current licensee, walking backwards.
- RIOS, SIGFREDOPRgranted 2012-09-24cancelled 2017-02-24
Successor callsigns
Callsigns held now by people who previously held KP4AZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4AZ, oldest first.
- Llona, Antonio PR2004-09-30 → cancelled 2016-12-30
- RIOS, SIGFREDO PR2017-02-24 active