Member State Entities
Belgium
| Name | ITU-R | ITU-T | ITU-D | Category |
| SPF Economie, P.M.E., Classes moyennes et Energie, BRUXELLES | - | - | - | MINISTRY |
| Institut Belge des Services Postaux & des Télécommunications (IBPT), BRUXELLES | - | - | - | ADMIN |
| BICS SA/NV, BRUSSELS | - | SG2 | - | ROA |
| Cullen International, Brussels | - | - | x | SIO |
| Proximus PLC, EVERE HAACHT | x | x | - | ROA |