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However, unlike a standard telephone directory, where the user uses customer's details (such as name and address) in order to retrieve the telephone number of that person or business, a reverse telephone directory allows users to search by a telephone service number in order to retrieve the customer details for that service.

List of mobile telephone prefixes by country Read Edit View history List of mobile telephone prefixes by country International prefixes table [ edit] See also [ edit] List of country calling codes Notes [ edit] ^ Mobile Prefix - The original prefix issued to the mobile network operator.

This list ranks the countries of the world by the number of mobile phone numbers in use. Note that it is not the number of phone devices that are being given here, but the number of phone numbers in a country. In some countries, one person might have two mobile phones.

List of countries by number of telephone lines in use Talk Read Edit View history This is a list of countries by number of telephone lines mostly based on The World Factbook [1] accessed in September 2010. See also [ edit] List of countries by number of broadband Internet subscriptions List of countries by number of Internet users