Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4JDM callsign genealogy
Currently held by CATALA, FRANK
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 WP4JDM's current licensee, walking backwards.
- MALDONADO, JOSE DPRgranted 2018-06-20cancelled 2018-07-20
Successor callsigns
Callsigns held now by people who previously held WP4JDM.
- MALDONADO, JOSE DPRgranted 2019-12-06
All historical holders
Every license row we've seen with the callsign WP4JDM, oldest first.
- CATALA, FRANK PR1990-07-03 → cancelled 2002-07-04
- MALDONADO, JOSE D PR2018-07-20 → cancelled 2019-12-06