Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4HDJ callsign genealogy
Currently held by DIODONET JUSTINIANO, HECTOR 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 KP4HDJ's current licensee, walking backwards.
- DIODONET JUSTINIANO, HECTORPRgranted 2022-07-21cancelled 2022-08-30
Successor callsigns
Callsigns held now by people who previously held KP4HDJ.
No current licensee on record previously held this callsign.