Network operators
Australia, Austria, Belgium, Bulgaria, Colombia, Cyprus, Czech Republic, Denmark, Egypt, Finland, France, Gambia, Germany, Greece, Hungary, India, Israel, Italy, Japan, Malta, Netherlands, New Zealand, Portugal, Qatar, Russia, South Africa, Spain, Sri Lanka, Sweden, Switzerland, Trinidad and Tobago, UK, Zimbabwe.
Sector regulators
Australia, Bahrain, Bangladesh, Botswana, Chile, Colombia, Denmark, East Timor, Egypt, Germany, Hong Kong, Jordan, Kenya, 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, Telephone Helplines Association, National Association of Citizens' Advice Bureaux.
International organisations
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), Telecommunications Regulators Association of Southern Africa (TRASA), Trans-European Research and Education Networking Association (TERENA).
Development agencies
Department for International Development (DFID), European Agency for Reconstruction (EAR), European Bank for Reconstruction and Development (EBRD), International Development Research Centre (IDRC), US Agency for International Development (USAID), World Bank.
Other consultancies
Adam Smith Institute, Analysys, Arthur Andersen, Astec Global, BT Telconsult, Chemonics, Indepen, Intelecon, Internews, InterConnect Communications, LCC, McCarthy Tétrault, Ovum, Phillips Tarifica, PricewaterhouseCoopers, Regulaid.
Universities
Brunel University, London School of Economics, Technical University of Denmark, University of Newcastle upon Tyne, University of Westminster, University of Witwatersrand.