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  1. T - AT&T Inc.

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

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

    In the United States, both interexchange carriers (IXCs) such as Sprint, AT&T Inc., and Verizon, and Local Exchange Carriers (LECs) such as Verizon and AT&T offer toll-free services. [2] [3] The way that a toll-free number is handled depends on whether it is a domestic or an interexchange call.

  4. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    The toll-free telephone numbers in NPA 800, 888, 877, 866, 855, 844, and 833 have been portable through the RespOrg system since 1993. Toll charges. Telephone calls between countries and territories of the NANP are not typically charged at domestic rates.

  5. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    In Spain, the "900XXXXXX" or "800XXXXXX" numbers are always toll-free (800 numbers are not usually used), "909XXXXXX" is used for dial-up Internet service and toll-free dialup Internet service (under subscription). Also "1002", "1004", "14XX", "15XX" and "16XX" are free and are used for the telecommunication providers call centers.

  6. 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, [2] but it remained active until the summer of 2020.

  7. Automatic number identification - Wikipedia

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

    Automatic number identification (ANI) 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 distance service in the Bell System , [3] [4 ...

  8. 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.

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