Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4RTU callsign genealogy
Currently held by Puerto Rico Digital Operators Group Services
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 WP4RTU'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 WP4RTU.
- KP4DOGactivePuerto Rico Digital Operators Group ServicesPRgranted 2021-06-07