17 district + non-commercial. A complete list of licensed operators and contractors is available from the Tanzania Communication Regulatory Authority (TCRA) website. Radio and television A state-owned national radio station and more than 40 privately owned radio stations are in operation (2007). A state-owned TV station and multiple privately owned TV stations are in operation (2007). The transmissions of several international broadcasters are available (2007). There are government restrictions on broadcasting in tribal languages. The semiautonomous Zanzibari government controls the content of all public and private radio and television broadcasts in its islands. Even in the case of state television broadcast from the mainland, there was a delay in the feed, allowing Zanzibari censors to intervene. However, Zanzibari radio stations operate relatively independently, often reading the content of national dailies, including articles critical of the Zanzibari government. Telephones Calling code: +255 International call prefix: 000 Main lines: 161,100 lines in use, 133rd in the world (2011). Mobile cellular: 27.2 million lines, 39th in the world (2012). Telephone system: telecommunications services are marginal; fixed-line telephone network inadequate with less than 1 connection per 100 persons; system operating below capacity and being modernized for better service; Very Small Aperture Terminal (VSAT) system under construction; mobile-cellular service, aided by multiple providers, is increasing rapidly and in 2011 exceeded a subscriber base of 50 telephones per 100 persons; trunk service provided by open-wire, microwave radio relay, tropospheric scatter, and fiber-optic cable; some links being made digital (2010). Communications cables: landing point for two fiber-optic cables (2010): SEACOM submarine and terrestrial high speed fibre-optic cable linking the countries of the east and west coasts of Africa to each other and on to Europe and India; and the EASSy fiber-optic submarine cable system linking East Africa with Europe, and North America. Satellite earth stations: 2 Intelsat (1 Indian Ocean, 1 Atlantic Ocean) (2010). Mobile phone companies Some of the mobile phone companies operating in Tanzania are: Airtel Tanzania MIC Tanzania Limited (Tigo Tanzania) formerly Mobitel Smart Telecom Tanzania Telecommunications Company Limited Viettel Tanzania Limited (Halotel) Vodacom Tanzania Zanzibar Telecom Limited (Zantel), providing service in Zanzibar, owned by Millicom, the government of Zanzibar, and Meeco International of Tanzania. Internet Top-level domain: .tz Internet users: 7.2 million users; 13.1% of the population, 182nd in the world (2016); Fixed broadband: 3,753 subscriptions, 164th in the world; less than 0.05% of the population, 187th in the world (2012). Wireless broadband: