Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4PNF callsign genealogy
Currently held by GRAJALES CRUZ, JOSE 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 WP4PNF'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 WP4PNF.
- GRAJALES CRUZ, JOSE JPRgranted 2025-12-30