Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4OP callsign genealogy
Currently held by PEREZ, OSCAR
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 WP4OP's current licensee, walking backwards.
- PEREZ, OSCARPRgranted 2017-06-08cancelled 2019-03-09
Successor callsigns
Callsigns held now by people who previously held WP4OP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4OP, oldest first.
- PASTRANA, VICTO M PR1998-03-05 → cancelled 2010-03-06
- PEREZ, OSCAR PR2019-03-09 active