Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5SJR callsign genealogy
Currently held by Castillo, 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 W5SJR's current licensee, walking backwards.
- Castillo, SantosTXgranted 2014-02-11cancelled 2014-05-24
Successor callsigns
Callsigns held now by people who previously held W5SJR.
No current licensee on record previously held this callsign.