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  2. List of mobile telephone prefixes by country - Wikipedia

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

    Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number.

  3. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/free-reverse-phone-lookup-8...

    Spy Dialer is a free reverse phone lookup service that accesses public databases of registered phone numbers to help users find information on cell phone and landline numbers and emails.

  4. E.164 - Wikipedia

    en.wikipedia.org/wiki/E.164

    E.164 is an international standard (ITU-T Recommendation), titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks.

  5. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    A JavaScript function can check to see if a phone number is a valid format, i.e., is numeric, starts with a valid set of numbers ("0" for local, or an international dialing prefix followed by a valid country code) and is not too short to be a phone number. At first a JavaScript function is used to clear out any spacer characters.

  6. Telephone number mapping - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_mapping

    Telephone number mapping is a system of unifying the international telephone number system of the public switched telephone network with the Internet addressing and identification name spaces. Internationally, telephone numbers are systematically organized by the E.164 standard, while the Internet uses the Domain Name System (DNS) for linking ...

  7. 1-800-FREE-411 - Wikipedia

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

    Callers then identify the city and state for the desired information, and can then search either by name or by business type. Free directory assistance is also available from an application for the iPhone and Android mobile phones, [2] and from their website. The service, provided entirely by computer and with no human operators, uses a voice ...