Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4JRL callsign genealogy
Currently held by ROSARIO-LEBRON, JESUS
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 KP4JRL's current licensee, walking backwards.
- ROSARIO LEBRON, JESUSPRgranted 2019-12-02cancelled 2019-12-20
Successor callsigns
Callsigns held now by people who previously held KP4JRL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4JRL, oldest first.
- ROSARIO-LEBRON, JESUS PR2006-06-02 → cancelled 2018-06-05
- ROSARIO LEBRON, JESUS PR2019-12-20 active