Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NP4JR callsign genealogy
Currently held by RODRIQUEZ SOBA, JOSE A
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 NP4JR's current licensee, walking backwards.
- RODRIQUEZ SOBA, JOSE APRgranted 2000-01-04cancelled 2008-11-14
Successor callsigns
Callsigns held now by people who previously held NP4JR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NP4JR, oldest first.
- COLON, JOSE PR1989-04-11 → cancelled 2001-04-12
- RODRIQUEZ SOBA, JOSE A PR2019-07-08 active