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

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

    In the early 1980s, Bell Labs received a patent for what became AT&T's "Advanced 800 Service", a computer-controlled system where any toll-free number could point to any destination number, such as to a small business local number instead of a special InWATS line, and an itemized bill generated only for the calls the business actually received.

  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. List of telephone country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_country...

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Telephone country codes, but also sometimes referred to as country dial-in codes, or historically international subscriber dialing (ISD) codes in the U.K., are telephone number dialing prefixes for reaching subscribers in foreign countries or areas via international telecommunication networks.

  5. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Calls are free for all fixed line calls. Mobile carriers AIS and CAT (60+%o f Thailand's subscribers) offer 1-800 service for cell phones. DTAC and True mobile providers currently [when?] do not, but it is expected they will offer the 1-800 service for subscribers by late 2009. [needs update] In Turkey, the prefix for toll-free numbers is "0800".

  6. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    The second largest mobile network coverage in Mongolia 98xxxxxx: G-Mobile: The newest mobile network of Mongolia 99xxxxxx: Mobicom Corporation: The first Mongolian cellphone operator Montenegro +382: 60: 8: Revolucija, VMNO under MTEL CG: 63: Telenor Montenegro: 66: Volim, VMNO under T-Mobile: 67: T-Mobile: 68: MTEL CG: 69: Telenor Montenegro ...

  7. Contact AOL customer support

    help.aol.com/articles/account-management...

    Find us on X (formerly known as Twitter) or Facebook. Paid members In addition to the support options listed above, paid members also have access to 24/7 phone support by calling 1-800-827-6364.

  8. T-Mobile US - Wikipedia

    en.wikipedia.org/wiki/T-Mobile_US

    T-Mobile US, Inc. is an American wireless network operator headquartered in Bellevue, Washington. Its majority shareholder and namesake is the German telecommunications company Deutsche Telekom. T-Mobile is the second largest wireless carrier in the United States, with 130 million subscribers as of December 31, 2024. [6]

  9. 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.