Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4ASD callsign genealogy
Currently held by Santiago Diaz, Alfredo
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 WP4ASD's current licensee, walking backwards.
- Santiago Diaz, AlfredoPRgranted 2019-07-15cancelled 2019-08-06
Successor callsigns
Callsigns held now by people who previously held WP4ASD.
No current licensee on record previously held this callsign.