| Afghanistan Telecom Regulatory Authority (ATRA) | Afganistan |
| Electronic and Postal Communications Authority (AKEP) | Albania |
| Ente Nacional de Comunicaciones (ENACOM) | Argentina |
| Australian Communications and Media Authority | Australia |
| Austrian Regulatory Authority for Broadcasting and Telecommunications | Austria |
| Utilities Regulation and Competition Authority (URCA) | Bahamas |
| Telecommunications Regulatory Authority (TRA) | Bahrain |
| Bangladesh Telecommunication Regulatory Commission (BTRC) | Bangladesh |
| Ministry of Communications and Informatization | Belarus |
| Institut Belge des Services Postaux & des Télécommunications (IBPT) | Belgium |
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