Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NP3IU callsign genealogy
Currently held by RUIZ, CARLOS E
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 NP3IU's current licensee, walking backwards.
- RUIZ, CARLOS EFLgranted 2014-09-17cancelled 2015-07-10
Successor callsigns
Callsigns held now by people who previously held NP3IU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP3IU, oldest first.
- ALVAREZ COLON, GLADYS PR1997-05-16 → cancelled 2008-12-30
- RUIZ, CARLOS E FL2025-07-05 active