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

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

    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 dialing code in the group NXX for various other purposes.

  3. Long-distance calling - Wikipedia

    en.wikipedia.org/wiki/Long-distance_calling

    By the 1980s, computerisation of the system allowed British Telecom "Linkline" 0800 freephone numbers and AT&T +1-800- toll-free numbers to be controlled by a database and terminated virtually anywhere with each inbound call itemised and billed individually.

  4. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Calling an 800-number is free of charge. Calling a 400-number incurs a local access charge. 800-numbers are accessible only to land-line subscribers, while 400-numbers are accessible to all land-line and mobile users. 800-toll-free numbers. 800 toll-free numbers are commonly called "800 免费电话".

  5. Unlimited wireless minutes coming soon for everyone? - AOL

    www.aol.com/2008/02/12/unlimited-wireless...

    One of the strategic ideas he's tossing around is getting rid of tracking minutes for wireless plans. No one knows how soon it might happen, but we SprintNextel's new CEO Dan Hesse is trying to...

  6. 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.

  7. Wide Area Telephone Service - Wikipedia

    en.wikipedia.org/wiki/Wide_Area_Telephone_Service

    RespOrgs were established in the U.S. in 1993 and Canada in 1994 to provide toll free number portability using the Service Management System ( SMS/800) database. Calls from Canada and the U.S., intrastate and interstate, could terminate at the same 1‑800 number, even via different carriers.

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