Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4RC callsign genealogy
Currently held by ALCAIDE SR, CARLOS J
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 KP4RC's current licensee, walking backwards.
- CRESPO-RODRIGUEZ, RUBENPRgranted 2018-06-05cancelled 2025-07-22
- 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 KP4RC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4RC, oldest first.
- ALCAIDE SR, CARLOS J PR1997-12-10 → cancelled 2009-12-11
- ALCAIDE, CARLOS J PR2011-07-12 → cancelled 2023-07-13
- CRESPO-RODRIGUEZ, RUBEN PR2025-07-22 active