Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4JV callsign genealogy
Currently held by RAMIREZ-FERRER, FERNANDO L
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 NP4JV's current licensee, walking backwards.
- VALLEJO MARRERO, JULIO EPRgranted 2022-01-31cancelled 2022-02-18
Successor callsigns
Callsigns held now by people who previously held NP4JV.
- RAMIREZ-FERRER, FERNANDO LAZgranted 2019-08-06
All historical holders
Every license row we've seen with the callsign NP4JV, oldest first.
- RAMIREZ-FERRER, FERNANDO L AZ2011-09-16 → cancelled 2019-08-06
- VALLEJO MARRERO, JULIO E PR2022-02-18 active