Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4SUP callsign genealogy
Currently held by MENDEZ MARRERO, SONIA
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 WP4SUP'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 WP4SUP.
- MENDEZ MARRERO, SONIAPRgranted 2023-09-09cancelled 2025-07-19