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  2. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    Contents. Toll-free telephone numbers in the North American Numbering Plan. Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special ...

  3. Automatic number identification - Wikipedia

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

    Automatic number identification. Automatic number identification ( ANI) [1] [2] is a feature of a telecommunications network for automatically determining the origination telephone number on toll calls for billing purposes. Automatic number identification was originally created by the American Telephone and Telegraph Company (AT&T) for long ...

  4. Directory assistance - Wikipedia

    en.wikipedia.org/wiki/Directory_assistance

    Companies requested to have their toll-free number listed, and paid the providers each time their phone number was released to a toll-free directory-assistance caller. In 1999, AT&T applied for permission to discontinue this service, but it remained active until the summer of 2020. An automated disconnection recording now plays when you call ...

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

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

    5. GreatPeopleSearch. GreatPeopleSearch is a user-friendly free reverse phone number lookup site that provides searchers with fast and accurate results. It draws on publicly available national ...

  6. 1-800-FREE-411 - Wikipedia

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

    1-800-FREE-411 is an American service offering advertising-supported directory assistance, operated by Marchex. Service [ edit ] Callers dial 1-800 (888 or 866)-FREE411 [373-3411] from any phone in the United States to use the toll-free service.

  7. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Toll-free telephone number. A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls. For the calling party, a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing prefix similar to an area code.

  8. No. 4 Electronic Switching System - Wikipedia

    en.wikipedia.org/wiki/No._4_Electronic_Switching...

    The No. 4 Electronic Switching System ( 4ESS) is a class 4 telephone electronic switching system that was the first digital electronic toll switch introduced by Western Electric for long-distance switching. It was introduced in Chicago in January 1976, to replace the 4A crossbar switch. [1] The last of the 145 systems in the AT&T network was ...

  9. 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 ...

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