Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4D callsign genealogy
Currently held by CRUZ, EMMANUEL 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 NP4D's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NP4D.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP4D, oldest first.
- DELGADO PEREZ, DIEGO M PR2007-07-17 → cancelled 2019-08-02
- CRUZ, EMMANUEL J PR2019-08-20 active