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Learn about the history and usage of fictitious telephone numbers in movies, music and other media. Find out why 555-555-5555 is not a valid number in North America and what are some examples of famous phone numbers.
The North American Numbering Plan (NANP) is a telephone numbering system for twenty-five regions in twenty countries, primarily in North America and the Caribbean. It uses a three-digit area code to identify each numbering plan area (NPA) and a seven-digit telephone number for each subscriber.
Learn how to dial telephone numbers in the United Kingdom, including the country code +44 and the international access code 00. Find out the different formats, prefixes and numbering plans for geographic and non-geographic numbers.
Learn how to dial phone numbers in France and its overseas territories, including the country code +33 and the international access code 00. Find out the history and format of the French telephone numbering plan and its changes over time.
Learn about the telephone number prefixes for reaching foreign countries or areas via international telecommunication networks. Find out the country code for Niger (227) and other countries in different world zones.
555 is a central office code in the North American Numbering Plan, used for directory assistance and fictional numbers. It is not an area code, but a prefix that can be followed by any of the 10,000 numbers in each NPA.
An unlisted number is a telephone number that is not listed in telephone books for a fee. It may also be called a silent number, private number, or ex-directory number in different countries.
The total length of all phone numbers (area code and the phone number) is constant at 10 digits. For example, the number 7513200000 signifies the area code 751 (the area code for Gwalior) followed by the phone number. Fixed-line or landline numbers are at most 8 digits long.