Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4KM callsign genealogy
Currently held by Benero Rivera, Ricardo J
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 WP4KM's current licensee, walking backwards.
- Benero Rivera, Ricardo JPRgranted 2019-09-06cancelled 2021-09-04
Successor callsigns
Callsigns held now by people who previously held WP4KM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4KM, oldest first.
- RODRIGUEZ, ELIU PR1998-02-19 → cancelled 2010-02-20
- Benero Rivera, Ricardo J PR2021-09-04 active