The Federal Communications Commission (FCC) has granted a total of 53 licenses and call signs in the category of Amateur license in San Lorenzo, Puerto Rico. Select a call sign from the table below to view its details such as the date of authorization, expiration date, service description, and so forth.
| Call Sign | License Holder Name | Date of Authorization |
|---|---|---|
| KK4GKZ | Ortiz, Victor | 2022-01-05 |
| KP3CF | LOPEZ FIGUEROA, EVARISTO | 2014-05-27 |
| KP4JA | OQUENDO LOPEZ, PEDRO I | 2011-10-05 |
| KP4VV | RIVERA, JOSE A | 2013-07-23 |
| NP3XG | BORGES, MIGUEL | 2018-07-23 |
| NP3XQ | DIAZ, BERNARDO | 2018-07-23 |
| NP4PX | DEL VALLE RAMOS, JUANA | 2004-02-19 |
| WP3DO | FREYTES, RAUL | 2010-02-05 |
| WP3HV | Colon-Flores, Noel | 2010-07-07 |
| WP3NK | ALICEA, ALFREDO | 2021-07-12 |
| WP3OK | Gomez-Gomez, Hilda I | 2022-02-08 |
| WP3OM | Girot-Alverio, Jonathan R | 2011-11-07 |
| | ||
| WP3ON | Alverio-Laureano, Carmen E | 2011-11-07 |
| WP3OO | Alverio-Laureano, Luis E | 2012-01-03 |
| WP3OR | Serrano-Serrano, Isidro | 2022-02-23 |
| WP3SI | ALMODOVAR RAMOS, MARIA D | 2012-05-23 |
| WP3SJ | AGUAYO-LEBRON, RAQUEL | 2012-04-24 |
| WP4AT | Rodriguez-Velazquez, Maria Del C | 2015-01-10 |
| WP4BY | Pagan-Rodriguez, Margie | 2004-06-16 |
| WP4CNU | JEREMIAS, FRANCISCO | 2013-05-21 |
| WP4EJH | Pedroza Flores, Manuel | 2017-03-23 |
| WP4EWX | TABARES CASTRO, LUZ M | 2023-04-20 |
| WP4FFC | SERRANO COLON, JORGE E | 2022-07-30 |
| WP4GYY | ROJAS SANTIAGO, RICARDO | 2007-03-28 |
| WP4HEH | SANTANA, VICTOR M | 2007-05-01 |
| WP4IVX | DE JESUS OQUENDO, LUCIANO | 2012-09-24 |
| WP4LOM | LUIS ZAYAS, ANGEL | 2004-04-15 |
| WP4LYU | BURGOS, ARLEX K | 2013-04-12 |
| WP4MQP | MALDONADO, JOHNNY | 2006-07-07 |
| WP4MRH | SANTANA, JOSE I | 2016-07-19 |
| WP4MRP | GOMEZ GOMEZ, JUAN R | 2016-02-04 |
| WP4MSU | FLORES, ISMAEL | 2014-07-30 |
| WP4NJT | BETANCOURT, RODOLFO | 2016-01-05 |
| WP4NNT | ROLDAN, JOSE M | 2008-04-29 |
| WP4NPO | SAMAR TANOS RADIO GROUP | 2016-02-26 |
| WP4NUP | Colon-Flores, Nicolas | 2007-06-05 |
| WP4OHY | Fiqueroa-Carrillo, Maria Del C | 2010-12-22 |
| WP4OOR | VAZQUEZ-MARTINEZ, ROSA L | 2012-07-13 |
| WP4OSE | Maldonado-Vazquez, Juan A | 2013-04-26 |
| WP4PHH | Ruiz Ramirez, Rafael J | 2014-12-10 |
| WP4PSH | Martinez Toledo, Brenda L | 2016-09-06 |
| WP4PSI | Melendez Gordian, Carlos I | 2016-09-06 |
| WP4PSL | Castro Ramos, Edgar U | 2016-09-06 |
| WP4PSM | Torres Figueroa, Hector J | 2016-09-06 |
| WP4QAH | Martinez-Martinez, Nora | 2018-04-04 |
| WP4QAI | Flores-Flores, Alberto | 2018-04-04 |
| WP4QDB | Ayala-Rivera, Luis D | 2018-06-04 |
| WP4QQN | Castillo, Roberto | 2018-11-13 |
| WP4RCQ | Prado - Claudio, Vincent I | 2019-05-31 |
| WP4RHH | Lopez Rivera, Jose A | 2019-10-04 |
| WP4RUN | San Lorenzo Ham Radio Club | 2021-05-24 |
| WP4SJY | Ruiz Reyes, Juan C | 2022-06-22 |
| WP4SSX | DIAZ RIVERA, AMARILLYS | 2023-02-28 |
