Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4JLZ callsign genealogy
Currently held by ESCOBAR, JUAN 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 WP4JLZ's current licensee, walking backwards.
- Zambrana-Rodriguez, Jorge LPRgranted 2020-11-16cancelled 2020-12-04
Successor callsigns
Callsigns held now by people who previously held WP4JLZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4JLZ, oldest first.
- ESCOBAR, JUAN R PR1990-10-02 → cancelled 2002-10-03
- Zambrana-Rodriguez, Jorge L PR2020-12-04 active