Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4RRR callsign genealogy
Currently held by RUIZ RIVERA, ROBERT
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 KP4RRR's current licensee, walking backwards.
- RUIZ RIVERA, ROBERTPRgranted 2023-08-22cancelled 2023-09-09
Successor callsigns
Callsigns held now by people who previously held KP4RRR.
No current licensee on record previously held this callsign.