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  2. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    An unpublished number is also excluded from directory assistance services, such as 411. Landline telephone companies often charge a monthly fee for this service. As cellular phones become more popular, there have been plans to release cell phone numbers into public 411 and reverse number directories via a separate Wireless telephone directory ...

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

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

    There’s an easy way to find out: conduct a reverse phone lookup — for free. But is there a truly free reverse phone lookup? Yes — there are plenty of sites that offer free reverse phone lookups.

  4. Reverse lookup - Wikipedia

    en.wikipedia.org/wiki/Reverse_lookup

    Reverse lookup is a procedure of using a value to retrieve a unique key in an associative array. [1] Applications of reverse lookup include reverse DNS lookup, which provides the domain name associated with a particular IP address, [2] reverse telephone directory, which provides the name of the entity associated with a particular telephone ...

  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. NumberGuru - Wikipedia

    en.wikipedia.org/wiki/NumberGuru

    NumberGuru works by entering the telephone number that the user wishes to find information on. The owner's name, phone carrier, location, and type of phone are returned in the results. [ 6 ] It also allows user to enter information about business or marketer numbers such as spam reports. [ 7 ]

  7. Intelius - Wikipedia

    en.wikipedia.org/wiki/Intelius

    It provides information services, including people and property search, background checks and reverse phone lookup. Users also have the ability to perform reverse address lookups to find people using Intelius’ services and an address. [2] Intelius, founded by former InfoSpace executives, was started in 2003.

  8. Telegram (software) - Wikipedia

    en.wikipedia.org/wiki/Telegram_(software)

    To start using Telegram, a user must sign-up with their phone number or an anonymous +888 number purchased from the Fragment blockchain platform. [58] [59] Changing the phone number in the app will automatically reassign the user's account to that number without the need to export data or notify their contacts.

  9. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    A "white pages" telephone directory. A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory.