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Within Australia, mobile phone numbers begin with 04 or 05 – the Australian national trunk code 0, plus the mobile indicator 4 or 5 – followed by eight digits. This is generally written as 04XX XXX XXX within Australia, or as +61 4XX XXX XXX for an international audience.

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.

A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory.