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  2. Toll-free number portability - Wikipedia

    en.wikipedia.org/wiki/Toll-free_number_portability

    The system was redesigned in 1981 to use a database, the SMS/800 service management system, which could direct any toll-free number to any destination based on various conditions; number prefixes remained tied to specific carriers until a RespOrg (responsible organization) structure was introduced in 1993 (US) and 1994 (Canada) to allow ...

  3. Directory assistance - Wikipedia

    en.wikipedia.org/wiki/Directory_assistance

    In the U.S., directory assistance for companies with toll-free "800 numbers" (with area codes 800, 833, 844, 855, 866, 877, and 888) was available from toll-free directory assistance, reachable by dialing 1-800-555-1212, for many decades until it was discontinued in 2020. [citation needed]

  4. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    In Portugal, the prefix is "800" so the 9-digit number is "800 xxx xxx". It is referred as chamada gratuita (free call) or as número verde (green number). In Qatar, toll-free numbers have the format "800' xxxx". [20] In Romania, toll-free numbers have the format "0800 xxx xxx". The service is referred to as număr verde.

  5. RespOrg - Wikipedia

    en.wikipedia.org/wiki/RespOrg

    A RespOrg, or responsible organization, is a company that maintains the registration for individual toll-free telephone numbers in the North American Numbering Plan by means of the distributed Service Management System/800 database.

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

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

    The SMS/800 database and RespOrg structure are used in the U.S. and Canada. A few specific exchanges remain reserved or are assigned to specific North American Numbering Plan countries which do not draw numbers from the SMS/800 pool: Some 800-NXX prefixes are reserved for the following areas: 800-389 for the Bahamas; 800-534 for Barbados

  7. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    For example, one switch might send only the last four or five digits of a telephone number. In one case, seven digit numbers were preceded by a digit 1 or 2 to differentiate between two area codes or office codes, (a two-digit-per-call savings). This improved revenue per trunk and reduced the number of digit receivers needed in a switch.

  8. 1-800-COLLECT - Wikipedia

    en.wikipedia.org/wiki/1-800-COLLECT

    1-800-COLLECT (1-800-265-5328) is a 1-800 number, owned and operated by WiMacTel, which provides fixed rate collect calling in the United States. The service was launched by MCI in 1993. History

  9. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    Codes 880 through 882 were used (until 1 April 2004) to allow international customers to access toll-free numbers they otherwise could not by paying the international portion of the toll. 880 was paired with 800, 881 with 888, and 882 with 877. [21] 888: toll-free telephone service: March 1, 1996: created; 889: not in use; available for toll ...