Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4HU callsign genealogy
Currently held by Del Valle-Rodriguez, Efren
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 NP4HU's current licensee, walking backwards.
- WP4DDOno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held NP4HU.
No current licensee on record previously held this callsign.