Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4JC callsign genealogy
Currently held by CRUZ CINTRON, ISMAEL
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 KP4JC's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KP4JC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4JC, oldest first.
- CRUZ CINTRON, ISMAEL FL2001-09-20 → cancelled 2007-10-28
- Cruz, Juan FL2021-02-12 active