Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4JJ callsign genealogy
Currently held by LUGO, JACOB
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 WP4JJ's current licensee, walking backwards.
- Morales-Wiscovitch, JuliettePRgranted 2015-04-02cancelled 2015-10-06
Successor callsigns
Callsigns held now by people who previously held WP4JJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4JJ, oldest first.
- LUGO, JACOB PR1997-04-19 → cancelled 2009-04-21
- Morales-Wiscovitch, Juliette PR2015-10-06 active