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  2. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    As of July 2023, California has 38 active area codes. Area code. Service area. Notes. 209. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. Split from 415 on October 26, 1957; split off 559 on November 14, 1998; overlaid with 350 on November 28, 2022. 213.

  3. 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 ...

  4. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  5. WhatsApp Business app adds customer service features to its ...

    techcrunch.com/2019/01/24/whatsapp-business-app...

    A year ago, Facebook-owned WhatsApp officially introduced its standalone app aimed at small business customers. Today, the WhatsApp Business app has grown to reach 5 million business customers ...

  6. WhatsApp builds a customer service app for businesses - Engadget

    www.engadget.com/2018-01-19-whatsapp-business...

    WhatsApp's push to get more businesses to use its platform, so it can finally rake in cash from its 1.3 billion users, now includes a full-fledged business app.

  7. Businesses on WhatsApp can share their info with QR codes

    www.engadget.com/whatsapp-qr-codes-business...

    Senior Editor. Thu, Jul 9, 2020 · 1 min read. WhatsApp. Businesses on WhatsApp can now take advantage of the app’s QR code feature to make it easier for customers to message them. A week after ...

  8. Developers can now verify mobile app users over WhatsApp ...

    techcrunch.com/2019/04/30/developers-can-now...

    When using a phone number to sign in, it’s common for the app to confirm the user by sending a verification code over SMS to the number provided. The user then enters that code to create their ...

  9. Telephone number - Wikipedia

    en.wikipedia.org/wiki/Telephone_number

    A telephone number serves as an address for switching telephone calls using a system of destination code routing. [ 1] Telephone numbers are entered or dialed by a calling party on the originating telephone set, which transmits the sequence of digits in the process of signaling to a telephone exchange. The exchange completes the call either to ...