Member State Entities
Bulgaria
| Name | ITU-R | ITU-T | ITU-D | Category |
| Ministry of Transport and Communications, SOFIA | - | - | - | ADMIN |
| Communications Regulation Commission, SOFIA | - | - | - | ADMIN RELATED |
| BULGARIA SAT, SOFIA | x | - | - | ROA |
| EnduroSat, Sofia | SG4 | - | - | SIO |
| Name | ITU-R | ITU-T | ITU-D | Category |
| Ministry of Transport and Communications, SOFIA | - | - | - | ADMIN |
| Communications Regulation Commission, SOFIA | - | - | - | ADMIN RELATED |
| BULGARIA SAT, SOFIA | x | - | - | ROA |
| EnduroSat, Sofia | SG4 | - | - | SIO |