Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4PA callsign genealogy
Currently held by Ayala-Cruz, Pedro
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 NP4PA's current licensee, walking backwards.
- Ayala-Cruz, PedroPRgranted 2019-08-02cancelled 2021-09-11
Successor callsigns
Callsigns held now by people who previously held NP4PA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP4PA, oldest first.
- RIOS TORRES, DANIEL PR1995-04-04 → cancelled 2007-04-05
- Ayala-Cruz, Pedro PR2021-09-11 active