Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4RX callsign genealogy
Currently held by VELEZ VALENTIN, RICARDO F
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 NP4RX's current licensee, walking backwards.
- VELEZ VALENTIN, RICARDO FPRgranted 2005-12-12cancelled 2014-08-08
Successor callsigns
Callsigns held now by people who previously held NP4RX.
- VELEZ VALENTIN, RICARDO FPRgranted 2020-02-29
All historical holders
Every license row we've seen with the callsign NP4RX, oldest first.
- RABANAL, DECIO PR1994-11-16 → cancelled 2003-10-09
- VELEZ VALENTIN, RICARDO F PR2014-08-08 → cancelled 2020-02-29