Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4LS callsign genealogy
Currently held by SANTIAGO RUIZ, LUIS 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 WP4LS's current licensee, walking backwards.
- SANTIAGO RUIZ, LUIS APRgranted 2018-05-07cancelled 2018-05-25
Successor callsigns
Callsigns held now by people who previously held WP4LS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4LS, oldest first.
- MESTRE, HECTOR G PR1987-09-29 → cancelled 1999-09-30
- SANTIAGO RUIZ, LUIS A PR2018-05-25 active