Confidence: Medium · Source: FCC ULS · As of 2026-09-10
WP4MP callsign genealogy
Currently held by PEREZ, MARIO L
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 WP4MP's current licensee, walking backwards.
- PEREZ, MARIO LPRgranted 2018-10-18cancelled 2018-11-06
Successor callsigns
Callsigns held now by people who previously held WP4MP.
- PEREZ, MARIO LPRgranted 2018-12-27cancelled 2019-08-09
All historical holders
Every license row we've seen with the callsign WP4MP, oldest first.
- OTERO AMEZAGU, BEXAIDA J PR1987-11-17 → cancelled 1999-11-18
- PEREZ, MARIO L PR2018-11-06 → cancelled 2018-12-27