Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4PWX callsign genealogy
Currently held by Matias Rivera, Heriberto
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 WP4PWX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WP4PWX.
- Matias Rivera, HeribertoOHgranted 2018-11-27