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  2. 411 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/411_(telephone_number)

    Direct-distance dialing (DDD) was first introduced in areas with common-control switching (panel and crossbar) in the 1950s.These areas had used 411 for directory assistance, and because of the ability of common-control switching to analyze the initial digits of a number in a "sender" before routing the call, these areas did not require the dialing of an initial 1 to initiate a long-distance call.

  3. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    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. Its purpose is to allow the telephone number of a subscriber identified by ...

  4. Directory assistance - Wikipedia

    en.wikipedia.org/wiki/Directory_assistance

    In telecommunications, directory assistance or directory inquiries is a phone service used to find out a specific telephone number and/or address of a residence, business, or government entity. Technology

  5. 1-800-FREE-411 - Wikipedia

    en.wikipedia.org/wiki/1-800-FREE-411

    By the spring of 2008 it had, according to TechCrunch, "captured a six percent market share of directory assistance calls." At that time, Jingle Networks received 20 million calls per month. [4] Since that peak, the company has reported fewer calls, around 15 million per month, as consumers shift to smart-phones to get directory information. [5]

  6. Telephone number - Wikipedia

    en.wikipedia.org/wiki/Telephone_number

    The number contains the information necessary to identify the intended endpoint for a telephone call. Many countries use fixed-length numbers in a so-called closed numbering plan. [5] A prominent system of this type is the North American Numbering Plan.

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

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

    Spy Dialer is a free reverse phone lookup service that accesses public databases of registered phone numbers to help users find information on cell phone and landline numbers and emails. You might ...

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