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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.

  3. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    800-toll-free numbers in China are ten-digit numbers beginning with "800". There is no prefix before "800". 800-toll-free numbers are not accessible to mobile network subscribers and some land-line subscribers. For instance China Tietong Telecom land-line users cannot access 800 numbers.

  4. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    Canada and the United States have experienced rapid growth in the number of area codes, particularly between 1990 and 2005. The widespread adoption of fax, modem, and mobile phone communication, as well as the deregulation of local telecommunication services in the United States during the mid-1990s, increased the demand for telephone numbers.

  5. 555 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/555_(telephone_number)

    The 555 exchange is not reserved in area codes used for toll-free phone numbers. This led to the video game The Last of Us accidentally including the number to a phone-sex operator. [9] The number "555-2368" (or 311-555-2368) is a carryover from the "EXchange 2368" ("Exchange CENTral") number common in telephone advertisements as early as the ...

  6. 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 ...

  7. 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.

  8. 1-800-FREE-411 - Wikipedia

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

    Callers dial 1-800 (888 or 866)-FREE411 [373-3411] from any phone in the United States to use the toll-free service. Sponsors cover part of the service cost by playing advertising messages during the call. Callers always hear an ad at the beginning of the call, and then another after they have made their request.

  9. Wide Area Telephone Service - Wikipedia

    en.wikipedia.org/wiki/Wide_Area_Telephone_Service

    With "inward WATS", introduced for interstate calls by the American Telephone and Telegraph Company (AT&T) in 1967, subscribers were issued a toll-free telephone number in a designated toll-free area code. Unlike a standard collect call or a call to a Zenith number, 1‑800 normally may be dialed directly with no live operator. Callers within a ...