Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4MN callsign genealogy
Currently held by Nieves, Mervin E
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 WP4MN's current licensee, walking backwards.
- Nieves Nieves, Mervin EPRgranted 2022-06-01cancelled 2023-01-10
Successor callsigns
Callsigns held now by people who previously held WP4MN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4MN, oldest first.
- DE JESUS, NOEMI PR1987-11-03 → cancelled 1999-11-04
- Nieves, Mervin E PR2023-01-10 active