Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4EAR callsign genealogy
Currently held by Rivera-vazquez, Efrem 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 KP4EAR's current licensee, walking backwards.
- Rivera-vazquez, Efrem APRgranted 2016-04-09cancelled 2016-08-26
Successor callsigns
Callsigns held now by people who previously held KP4EAR.
No current licensee on record previously held this callsign.