Confidence: Medium · Source: FCC ULS · As of 2026-09-09
NP4KB callsign genealogy
Currently held by CRUZ ROMERO, LUIS 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 NP4KB's current licensee, walking backwards.
- CRUZ, LUIS EPRgranted 2014-04-28cancelled 2014-07-29
Successor callsigns
Callsigns held now by people who previously held NP4KB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP4KB, oldest first.
- RAMOS JR, RIGOBERTO PR1999-09-03 → cancelled 2011-09-07
- CRUZ ROMERO, LUIS E PR2024-07-02 active