Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4NPI callsign genealogy
Currently held by Radioaficionados En Accion, Inc
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 WP4NPI'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 WP4NPI.
- KP4RAAexpiredRadioaficionados En Accion, IncPRgranted 2005-03-15cancelled 2017-03-16