Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4JSC callsign genealogy
Currently held by ROSARIO VELEZ, JOSE 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 KP4JSC's current licensee, walking backwards.
- SILVA CUADRA, JUANA MPRgranted 2022-04-18cancelled 2022-05-06
Successor callsigns
Callsigns held now by people who previously held KP4JSC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4JSC, oldest first.
- ROSARIO VELEZ, JOSE A PR1999-12-28 → cancelled 2001-05-24
- SILVA CUADRA, JUANA M PR2022-05-06 active