Network operators
Australia, Austria, Belgium, Bulgaria, Colombia, Cyprus, Czech Republic, Denmark, Egypt, Finland, France, Gambia, Georgia, Germany, Greece, Hungary, India, Ireland, Israel, Italy, Japan, Malta, Netherlands, New Zealand, Portugal, Qatar, Russia, South Africa, Spain, Sri Lanka, Sweden, Switzerland, The Bahamas, Trinidad and Tobago, UK, Zimbabwe.
Sector regulators
Armenia, Australia, Bahrain, Bangladesh, Botswana, Chile, Colombia, Croatia, Denmark, East Timor, Egypt, Germany, Hong Kong, Jamaica, Jordan, Kenya, Lebanon, Macedonia, Maldives, Mongolia, Morocco, Nepal, Netherlands, Nigeria, Pakistan, Portugal, South Africa, Spain, Sri Lanka, UK.
Service regulators
Independent Committee for the Supervision of standards of Telephone Information Services (ICSTIS), Internet Watch Foundation, Nominet UK.
Consumer organisations
Consumers' Association, Consumers' Telecoms Network (Australia), National Consumer Council, Public Utilities Access Forum, Telecommunications Users Association of New Zealand, Telephone Helplines Association, National Association of Citizens' Advice Bureaux.
International organisations
African Forum of Utility Regulators (AFUR), Communications Regulators Association of Southern Africa (CRASA), Commonwealth Telecommunications Organisation (CTO), Council of Europe (Human Rights Directorate), European Commission (Information Society, Competition, Consumer Policy Directorates), Delivery of Advanced Network Technology to Europe (DANTE), European Telecommunications Office (ETO), International Telecommunication Union (ITU), Trans-European Research and Education Networking Association (TERENA).
Development agencies
UK Department for International Development (DFID), European Agency for Reconstruction (EAR), European Bank for Reconstruction and Development (EBRD), Gesellschaft für Technische Zusammenheit (GTZ), Inter-American Development Bank (IADB), International Development Research Centre (IDRC), US Agency for International Development (USAID), US Department of Commerce, World Bank.
Other consultancies
Adam Smith Institute, Analysys, Arthur Andersen, Astec Global, BT Telconsult, Chemonics, Frontier Economics, Indepen, Intelecon, Internews, InterConnect Communications, LCC, McCarthy Tétrault, Ovum, Phillips Tarifica, Plum, PricewaterhouseCoopers, Project Finance Advisors, Regulaid, Transcomm.
Universities
Brunel University, London School of Economics, Technical University of Denmark, University of Newcastle upon Tyne, University of Westminster, University of Witwatersrand.