Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4HRC callsign genealogy
Currently held by Castro-Zayas, Hector R
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 KP4HRC's current licensee, walking backwards.
- Castro-Zayas, Hector RPRgranted 2018-11-13cancelled 2019-02-22
Successor callsigns
Callsigns held now by people who previously held KP4HRC.
No current licensee on record previously held this callsign.