Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4WS callsign genealogy
Currently held by SEVILLA, WILFREDO
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 NP4WS's current licensee, walking backwards.
- Pinero-Mattei, Wanda IPRgranted 2018-06-04cancelled 2018-06-26
Successor callsigns
Callsigns held now by people who previously held NP4WS.
- SEVILLA, WILFREDOPRgranted 2023-11-10
All historical holders
Every license row we've seen with the callsign NP4WS, oldest first.
- ROCA, MIGUEL W PR1996-03-26 → cancelled 2008-03-27
- SEVILLA, WILFREDO PR2013-02-02 → cancelled 2014-01-10
- Pinero-Mattei, Wanda I PR2018-06-26 active