The Federal Communications Commission (FCC) has granted a total of 57 licenses and call signs in the category of Amateur license in Cayey, 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 |
|---|---|---|
| KJ4LOZ | Velazquez, Ariel L | 2019-03-14 |
| KP4BP | ESPADA ACEVEDO, RUBEN | 2015-12-02 |
| KP4EOF | ALBERT, ANA B | 2007-12-04 |
| KP4GL | ARCHILLA, CARLOS A | 2017-07-10 |
| KP4JD | RAMOS MATEO, ANTONIO | 2015-03-03 |
| KP4ZC | ALBERT CORDERO, FELIX | 2007-11-24 |
| NP3JT | HERNANDEZ RODRIGUEZ, WILLIAM | 2017-01-21 |
| NP3JX | MEIER, KARL A | 2018-02-20 |
| NP4JN | SOTO, HEBER M | 2019-10-22 |
| NP4SZ | RIVERA RODRIGUEZ, ISMAEL | 2005-09-12 |
| WP3TC | Solivan-Vega, Jimmy | 2012-07-06 |
| WP3UM | Burgos-Pomales, Pedro A | 2013-09-28 |
| | ||
| WP3UO | Colon-Martinez, Franklin | 2012-10-04 |
| WP3UP | Melendez-De Jesus, Jose R | 2022-09-16 |
| WP3UQ | Santamaria Rodriguez, Manuel E | 2013-07-12 |
| WP4BSJ | TORRES JR, ANGEL L | 2018-10-01 |
| WP4GZ | Castano-Delgado, Jose L | 2005-03-01 |
| WP4JQI | ORTEGA, VICTOR M | 2010-11-15 |
| WP4LGD | Gonzalez, Ismael | 2012-04-03 |
| WP4LOB | CARRASQUILLO, JOSE A | 2013-06-06 |
| WP4MRC | SANTIAGO, FERNANDO | 2004-04-30 |
| WP4MXB | QUINONES ROQUE, CARLOS E | 2015-02-05 |
| WP4NAU | RODRIGUEZ RIVERA, LUIS E | 2017-02-21 |
| WP4NBA | COLON, JORGE L | 2005-08-31 |
| WP4NSL | COLON-SANCHEZ, JOHN D | 2006-06-09 |
| WP4NSN | Sanchez-Colon, Christian J | 2018-02-14 |
| WP4NSO | ARCOS-RIVERA, JUAN A | 2006-07-11 |
| WP4NUB | SANTIAGO-MAYMI, JONATHAN | 2007-03-08 |
| WP4NUC | SANCHEZ DEL VALLE, SANDEL Y | 2018-01-31 |
| WP4OIE | Quiles-Vega, Luis A | 2021-01-12 |
| WP4OPM | Puerto Rico D Star Club | 2012-10-16 |
| WP4PHE | Rivera Torres, David G | 2014-12-10 |
| WP4PHM | CAMACHO VELAZQUEZ, ANDRES | 2014-12-19 |
| WP4POG | Rincon-Charris, Amilcar A | 2015-11-03 |
| WP4PQW | Santiago Rodriguez, Ana I | 2016-05-12 |
| WP4PQX | Santiago Rodriguez, Ricardo J | 2016-05-12 |
| WP4QGM | Luna-Colon, Lionel | 2018-07-10 |
| WP4QQT | Resto-Otero, Wilfredo | 2018-11-13 |
| WP4QWI | Guadalupe Castano, Carlos J | 2018-12-06 |
| WP4QXQ | SANTIAGO CABRERA, MANUEL | 2018-12-28 |
| WP4QYJ | Melendez-Rivera, Noel G | 2019-02-27 |
| WP4QYL | Rivera-Zayas, Ismael | 2019-02-27 |
| WP4QYM | Ramos-Marquez, Maria | 2019-02-27 |
| WP4QYW | Rincon - Torres, Alejandro | 2019-03-07 |
| WP4RAU | Arzola-Pagan, Erick D | 2019-03-18 |
| WP4RBO | MUNOZ, ANTONIO | 2019-04-05 |
| WP4RDW | Santiago Diaz, Alfredo | 2019-07-15 |
| WP4RJJ | Rosa-Barreto, Pedro L | 2019-12-11 |
| WP4RKW | SIEVENS IRIZARRY, CARMEN | 2020-02-24 |
| WP4RLM | Vicente-Flores, Saul | 2020-03-10 |
| WP4RMS | Vega, Damaris | 2020-06-25 |
| WP4RNB | LOPEZ AVILES, ERNESTO | 2020-07-13 |
| WP4ROC | VELAZQUEZ VICENTE, RAFAEL | 2020-08-31 |
| WP4ROE | VAZQUEZ, NANCY I | 2020-08-31 |
| WP4RSU | Quiles Santiago Sr., Javier A | 2021-03-03 |
| WP4RZG | AVILES FRANCO, JESUS | 2021-08-16 |
| WP4SIB | TORRES ORTIZ, RICARDO | 2022-05-17 |
