Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4JAL callsign genealogy
Currently held by VAZQUEZ VARGAS, SANTOS
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 WP4JAL's current licensee, walking backwards.
- SANTIAGO, JOSSUE MPRgranted 2018-12-03cancelled 2018-12-28
Successor callsigns
Callsigns held now by people who previously held WP4JAL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4JAL, oldest first.
- VAZQUEZ VARGAS, SANTOS PR2000-06-27 → cancelled 2012-09-19
- SANTIAGO, JOSSUE M PR2018-12-28 active