Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4DY callsign genealogy
Currently held by MONTANEZ MERCADO, JESUS
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 KP4DY's current licensee, walking backwards.
- CRESPO-RODRIGUEZ, RUBENPRgranted 2017-02-28cancelled 2018-06-05
- Resto Jimenez, CHRISTOPHER JPRgranted 2022-08-26
- RESTO JIMENEZ, CHRISTOPHER JPRgranted 2021-08-23cancelled 2022-08-26
- RESTO JIMENEZ, CHRISTOPHER JPRgranted 2021-06-28cancelled 2021-08-23
Successor callsigns
Callsigns held now by people who previously held KP4DY.
- CRESPO-RODRIGUEZ, RUBENPRgranted 2025-07-22
All historical holders
Every license row we've seen with the callsign KP4DY, oldest first.
- MONTANEZ MERCADO, JESUS PR1998-02-25 → cancelled 2010-02-26
- CRESPO-RODRIGUEZ, RUBEN PR2018-06-05 → cancelled 2025-07-22