Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KP4DOC callsign genealogy
Currently held by ORTIZ CASTILLO, DAVID
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 KP4DOC's current licensee, walking backwards.
- ORTIZ CASTILLO, DAVIDPRgranted 2021-05-21cancelled 2021-09-18
Successor callsigns
Callsigns held now by people who previously held KP4DOC.
No current licensee on record previously held this callsign.