Confidence: Medium · Source: FCC ULS · As of 2026-09-11
WP4FJS callsign genealogy
Currently held by SANTIAGO, FRANCISCO J
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 WP4FJS's current licensee, walking backwards.
- SANTIAGO, FRANCISCO JPRgranted 2010-01-25cancelled 2010-02-17
Successor callsigns
Callsigns held now by people who previously held WP4FJS.
- SANTIAGO, FRANCISCO JFLgranted 2020-07-09cancelled 2023-03-22