| Call | Name | City | State | Class | Old Call | Effective Date | Expiration Date | Status |
|---|
| KP4ALI | QUINONES ORTIZ, ANGEL L | LOIZA | PR | G | WP4MOU | 03/12/2019 | 03/12/2029 | Active |
| KP4FM | DIAZ LOPEZ, OSCAR D | LOIZA | PR | E | | 10/23/2020 | 01/20/2031 | Active |
| KP4LEF | Fuentes, Luis E | Loiza | PR | E | WP4RVL | 07/16/2021 | 07/16/2031 | Active |
| KP4MC | CALDERON MATOS, VICTOR J | LOIZA | PR | E | WP4OVQ | 05/06/2014 | 05/06/2024 | Active |
| KP4MRA | SALGADO, JUAN L | LOIZA | PR | G | WP4MRA | 11/27/2018 | 01/28/2029 | Active |
| KP4ROH | ORTIZ, ROBERTO | LOIZA | PR | T | WP4LLI | 06/10/1999 | 06/10/2009 | Expired |
| KP4ROH | ORTIZ, ROBERTO | LOIZA | PR | T | KN4QZZ | 12/22/2018 | 12/22/2028 | Active |
| NP3KR | ESCALERA BORIA, FRANKIE | LOIZA | PR | T | | 09/15/2017 | 09/15/2027 | Active |
| NP3WV | RIVERA, ANGEL L | LOIZA | PR | T | | 03/09/2019 | 03/09/2029 | Active |
| NP4C | GARCIA PIZARRO JR, BENJAMIN | Loiza | PR | E | KP4SX | 04/30/2022 | 07/23/2032 | Active |
| WP3NY | Cartagena-Vergara, Candido | LOIZA | PR | T | | 10/13/2021 | 11/28/2031 | Active |
| WP4LJT | DIAZ, CESAR A | LOIZA | PR | N | | 07/16/2002 | 11/02/2011 | Expired |
| WP4MPC | VAZQUEZ HADDOCK, GERARDO | LOIZA | PR | G | | 04/16/2014 | 05/24/2024 | Active |
| WP4OVQ | CALDERON MATOS, VICTOR J | LOIZA | PR | E | | 11/18/2013 | 11/18/2023 | Cancelled |
| WP4PJT | NAVARRO LANZO, ESTEBAN | LOIZA | PR | G | | 04/21/2015 | 04/21/2025 | Active |
| WP4QO | LACEN CORREA, FELIX | LOIZA | PR | G | | 05/21/2008 | 06/09/2018 | Expired |
| WP4QVC | Garcia-Allende, Ashanti M | Loiza | PR | G | | 11/14/2018 | 11/14/2028 | Active |
| WP4ROM | Carrasquillo, Carlos J | LOIZA | PR | T | | 09/08/2020 | 09/08/2030 | Active |
| WP4RVL | Fuentes, Luis E | Loiza | PR | T | | 06/28/2021 | 06/28/2031 | Cancelled |
