Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4DE callsign genealogy
Currently held by VALLADARES, GERARDO
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 NP4DE's current licensee, walking backwards.
- VALLADARES, GERARDOPRgranted 2018-02-01cancelled 2022-12-20
Successor callsigns
Callsigns held now by people who previously held NP4DE.
- MATIAS CHAPARRO, DAMARIS EFLgranted 2018-06-08
All historical holders
Every license row we've seen with the callsign NP4DE, oldest first.
- MATIAS CHAPARRO, DAMARIS E PR2018-01-05 → cancelled 2018-06-08
- VALLADARES, GERARDO PR2022-12-20 active