Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4JIR callsign genealogy
Currently held by RIVERA, JOSE ISIDRO
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 KP4JIR's current licensee, walking backwards.
- RIVERA, JOSE ISIDROPRgranted 2008-06-03cancelled 2018-05-25
Successor callsigns
Callsigns held now by people who previously held KP4JIR.
No current licensee on record previously held this callsign.