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  2. RespOrg - Wikipedia

    en.wikipedia.org/wiki/RespOrg

    A toll-free number was merely an index into a large, distributed database; any number could be reassigned geographically anywhere by changing its database record. A call could be routed to one of multiple locations based on the call origin, load balancing between multiple call centers, times, or days.

  3. 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 ...

  4. 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.

  5. Somos, Inc. - Wikipedia

    en.wikipedia.org/wiki/Somos,_Inc.

    Toll-free telephone service is a telecommunication service in which subscribers are assigned telephone number in NPAs 800, 888, 877, 866, 855, 844, and 833. Calls to these numbers incur no toll charges for callers. The American Telephone & Telegraph Company (AT&T) first introduced 800 toll-free service in 1967. [2]

  6. Standard Carrier Alpha Code - Wikipedia

    en.wikipedia.org/wiki/Standard_Carrier_Alpha_Code

    SCAC is also used to identify an ocean carrier or self-filing party, such as a freight forwarder, for the Automated Manifest System used by US Customs and Border Protection for electronic import customs clearance and for manifest transmission as per the USA's "24 Hours Rule" which requires the carrier to transmit a cargo manifest to US Customs ...

  7. Automatic number identification - Wikipedia

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

    Modern toll-free telephone numbers, which generate itemized billing of all calls received instead of relying on the special fixed-rate trunks of the Bell System's original Inward WATS service, depend on ANI to track inbound calls to numbers in special area codes such as +1-800, 888, 877, 866, 855, 844, and 833 with 822 reserved for future toll free use (United States and Canada), 1800 ...

  8. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Many toll-free numbers are not available from cell phones (usually blocked by the cell phone provider rather than by the provider of the toll-free number, in an effort to prevent low-price competition from calling card providers). Some toll-free numbers are not available from phones listed by the owner of the number, including many payphones ...

  9. 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.