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  2. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    Telephone number verification Telephone number verification (or validation) services are online services used to establish whether a given telephone number is in service. They may include a form of Turing test to further determine if a human answers or answering equipment such as a modem, fax, voice mMail or answering machine .

  3. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    In the United Kingdom, telephone numbers are administered by the Office of Communications ( Ofcom ). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations. Telephone numbers are of variable length.

  4. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    Reverse telephone directory A reverse telephone directory (also known as a gray pages directory, criss-cross directory or reverse phone lookup) is a collection of telephone numbers and associated customer details. 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 ...

  5. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    Have you ever wondered who owns that phone number? You know, the one that keeps calling you and won't leave you alone? Try a free reverse phone lookup site to find out who's calling.

  6. Fictitious telephone number - Wikipedia

    en.wikipedia.org/wiki/Fictitious_telephone_number

    Fictitious telephone number Ranges for fictitious telephone numbers are common in most telephone numbering plans. One of the main reasons these ranges exist is to avoid accidentally using real phone numbers in movies and television programs because of viewers frequently calling the numbers used.

  7. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    An automatic number announcement circuit ( ANAC) is a component of a central office of a telephone company that provides a service to installation and service technicians to determine the telephone number of a telephone line. The facility has a telephone number that may be called to listen to an automatic announcement that includes the caller's ...

  8. Non-geographic telephone numbers in the United Kingdom

    en.wikipedia.org/wiki/Non-geographic_telephone...

    Non-geographic telephone numbers in the United Kingdom A non-geographic number is a type of telephone number that is not linked to any specific locality. Such numbers are an alternative to the traditional 'landline' numbers that are assigned geographically using a system of location-specific area codes. Non-geographic numbers are used for various reasons, from providing flexible routing of ...

  9. History of telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/History_of_telephone...

    Telephone numbers in the United Kingdom have a flexible structure that reflects their historical demands, starting from many independent companies through a nationalised near-monopoly, to a system that supports many different services, including cellular phones, which were not envisaged when the system was first built. Numbers evolved in a piecemeal fashion, with numbers initially allocated on ...

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