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  2. Twilio - Wikipedia

    en.wikipedia.org/wiki/Twilio

    Twilio was founded in 2008 by Jeff Lawson, Evan Cooke, and John Wolthuis [4] and was based initially in Seattle, Washington, and San Francisco, California. [5] On November 20, 2008, the company launched Twilio Voice, an API to make and receive phone calls completely hosted in the cloud. [6] Twilio's text messaging API was released in February ...

  3. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    The remaining eight digits are the subscriber number. Toll Free: These are usually ten digit numbers beginning with 800 or 400. 800 (toll-free) are accessible only when called from landline phones, while 400 (shared toll) are accessible from all phones. 400 XXX XXXX or 800 XXXX XXXX.

  4. 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 ...

  5. 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. 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 ...

  6. Short code - Wikipedia

    en.wikipedia.org/wiki/Short_code

    Short codes are five digits in length, and start with 5. The second digit generally indicates the maximum price, with 0 = completely free, 1 = standard text rate only, 3 = €0.60, and 7 having no maximum. Codes beginning 59 are ostensibly intended for adult services, but few if any of these codes are used. [13]

  7. Automatic number announcement circuit - Wikipedia

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

    Automatic number announcement circuit. An automatic number announcement circuit (ANAC) is a component of a central office of a telephone company that provides a service to installation and service technicians to determine the telephone number of a telephone line. The facility has a telephone number that may be called to listen to an automatic ...

  8. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    Telephone number verification. Telephone number verification (or validation) services are online services used to establish whether a given telephone number is in service. They may include a form of Turing test to further determine if a human answers or answering equipment such as a modem, fax, voice mMail or answering machine.

  9. Wide Area Telephone Service - Wikipedia

    en.wikipedia.org/wiki/Wide_Area_Telephone_Service

    The WATS (Wide Area Telephone Service) line is the heart of all SNCC security and communications. For a flat monthly rate, an unlimited number of calls can be dialed directly to any place in the country — or the state — depending on what line one uses. The Jackson office has a state-wide line, the Atlanta office has the national WATS line.

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