| Australia |
Australian Communications and Media Authority - ACMA |
| Austria |
Rundfunk und Telekom Regulierungs-GmbH - RTR |
| Belgium |
Institut Belge des services Postaux et de Télécommunications - BIPT |
| Bulgaria |
Communications Regulation Commission - CRC |
| Croatia |
Hrvatska agencija za poštu i elektroničke komunikacije - HAKOM |
| Cyprus |
Office of the Commissioner of Electronic Communications and Postal Regulation - OCECPR |
| Czech Republic |
Český telekomunikační úřad - CTU |
| Denmark |
Telestyrelsen - National Telecom Agency - NTA |
| Estonia |
KONKURENTSIAMET |
| Finland |
Viestintävirasto Kommunikationsverket - FICORA |
| France |
Autorité de Régulation des Communications Electroniques et des Postes - ARCEP |
| Germany |
Bundesnetzagentur für Elektrizität, Gas, Telekommunikation, Post und Eisenbahnen - BNETZA |
| Greece |
National Telecommunications and Post Commission - EETT |
| Hungary |
Nemzeti Hírközlési Hatóság - NHH |
| Iceland |
Póst- og fjarskiptastofnun - PTA |
| Ireland |
Commission for Communications Regulation - ComReg |
| Italy |
Autorità per le Garanzie nelle Comunicazioni - AGCom |
| Italy |
Autorità garante della concorrenza e del mercato |
| Italy |
Garante per la protezione dei dati personali |
| Japan |
Japanese Ministry for Public Management, Home Affairs, Posts and Telecommunications - JTM |
| Latvia |
Sabiedrisko pakalpojumu regulesanas komisija - SPRK |
| Liechtenstein |
Amt für Kommunikation - AK |
| Lithuania |
Ryšių reguliavimo tarnyba - RRT |
| Luxembourg |
Institut Luxembourgeois de Régulation - ILR |
| Former Yugoslav Republic of Macedonia |
Agency for electronic communications - AEC |
| Malta |
Malta Communications Authority - MCA |
| Netherlands |
Onafhankelijke Post en Telecommunicatie Autoriteit - OPTA |
| New Zealand |
New Zealand Commerce Commission |
| Norway |
Post- og teletilsynet - PT |
| Poland |
Urzędu Komunikacji Elektronicznej - UKE |
| Portugal |
Autoridade Nacional de Comunicações - ANACOM |
| Romania |
Autoritatea Naţională pentru Administrare şi Reglementare în Comunicaţii - ANCOM |
| Singapore |
IDA Singapore |
| Slovak Republic |
Telekomunikacný úrad Slovenskej republiky - TO SR |
| Slovenia |
Agencija za pošto in elektronske komunikacije RS - APEK |
| Spain |
Comisión del Mercado de las Telecomunicaciones - CMT |
| Sweden |
Post- och Telestyrelsen - PTS |
| Switzerland |
Office fédéral de la Communication - OFCOM |
| Turkey |
Bilgi Teknolojileri ve İletişim Kurumu - BTK |
| United Kingdom |
Office of Communications - Ofcom |
| USA |
Federal Communications Commission - FCC |