| Name | ITU-R | ITU-T | ITU-D | Categories |
| Ministerio para la Transformación Digital y de la Función Pública, MADRID | | | | MINISTRY |
| Secretaría de Estado de Telecomunicaciones e Infraestructuras Digitales, MADRID | | | | ADMIN |
| Comisión Nacional de los Mercados y la Competencia (CNMC), MADRID | | | | ADMIN RELATED / REGULATOR |
| Axon Partners Group, Madrid | | | X | OTHER ENTITY |
| Case On IT, Madrid | | ASSOCIATE SG12 | | OTHER ENTITY |
| Cellnex Telecom, S.A., BARCELONA | X | | | ROA |
| Everycode-inSuit, Valencia | | | ASSOCIATE SG1 | SIO / SERVICE PROVIDER |
| Global Voice Group, Madrid | | | X | SIO |
| HISDESAT Servicios Estratégicos, Madrid | X | | | OTHER ENTITY |
| HISPASAT, S.A., Alcobendas, Madrid | X | | | ROA |
| Iberdrola, Madrid | | ASSOCIATE SG15 | | OTHER ENTITY |
| Indra Sistemas, Alcobendas | X | | | SIO |
| Insikt Intelligence, Barcelona | | ASSOCIATE SG17 | | SIO |
| Satelio IoT Services, S.L, Barcelona | ASSOCIATE SG4 | ASSOCIATE SG2 | | ROA |
| Startical, Madrid | ASSOCIATE SG4 | | | SIO / SERVICE PROVIDER |
| Telefónica S.A., MADRID | X | X | X | ROA |
| TOTHOMweb, Girona | | ASSOCIATE SG16 | | OTHER ENTITY |
| Wavecontrol, S.L., Barcelona | ASSOCIATE SG1 | ASSOCIATE SG5 | | SIO / MANUFACTURER |
