Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4CAO callsign genealogy
Currently held by OTERO-SANMIGUEL, ENRIQUE A
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 KP4CAO's current licensee, walking backwards.
- OTERO-SANMIGUEL, ENRIQUE APRgranted 2026-05-27cancelled 2026-06-16
Successor callsigns
Callsigns held now by people who previously held KP4CAO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4CAO, oldest first.
- MENDOZA, CARLOS PR2008-09-18 → cancelled 2020-12-10
- OTERO-SANMIGUEL, ENRIQUE A PR2026-06-16 active