Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4PP callsign genealogy
Currently held by NIEVES ORTIZ, HIPOLITO
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 KP4PP's current licensee, walking backwards.
- NIEVES-ORTIZ, HIPOLITOPRgranted 2009-07-02cancelled 2015-01-03
Successor callsigns
Callsigns held now by people who previously held KP4PP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4PP, oldest first.
- DELGADO MARQUEZ, PEDRO PR1988-08-23 → cancelled 2000-08-24
- NIEVES ORTIZ, HIPOLITO PR2015-01-03 active