Telephone directory

In telephony, a telephone directory is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organisation that publishes the directory.

Types

A telephone directory may also be called a phone book or may be known by the colour of the paper it is printed on.

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• White pages generally indicates personal or alphabetic listings.
• Yellow pages, sometimes called the A2Z, generally indicates a business directory classified by business type or services provided, almost always with paid advertising.
• Other colours may have other meanings, depending on a country's customs. Information on government agencies is often printed on blue or green pages.