Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4NZM callsign genealogy
Currently held by Puerto Rico Field Day Group
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 WP4NZM'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 WP4NZM.
- KP4FDactivePuerto Rico Field Day GroupPRgranted 2019-06-19