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  2. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    A telephone directory, commonly called a telephone book, telephone address book, phone book, 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. Its purpose is to allow the telephone number of a subscriber identified by ...

  3. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    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. However, these plans have come under opposition from internet based privacy advocate groups, and blogs, often citing privacy concerns.

  4. Whitepages (company) - Wikipedia

    en.wikipedia.org/wiki/Whitepages_(company)

    As of 2013 Whitepages provides its data and related services through seven web properties, ten mobile apps and through multiple web properties, including 411.com and Switchboard.com. The Hiya app (previously known as WhitePages Caller ID) checks incoming calls against a database of phone numbers known for spam or scam calls and helps users ...

  5. Telephone numbers in Germany - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Germany

    The German phone network became fully digitised in 1997, allowing more flexible use of the numbering space. On 1 January 1998, the Federal Network Agency (named the Regulatory Authority for Telecommunications and Postal Services at the time) became the numbering authority for phone numbers in Germany. See also. List of dialling codes in Germany

  6. Telephone numbers in the Netherlands - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    066, 084 and 087 are often used by scammers, because they are easy and cheap to register and make identification very hard. [citation needed]Previously, 06-0, 06-1000 and 06-4 were used for toll-free numbers, 06-8 for shared cost, 06-9 for premium rate, and other 06-numbers for mobile numbers. 0011 and later 06-11 was used for emergency services before this changed to 112. 09 was used as the ...

  7. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917.

  8. Telephone numbers in New Zealand - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_New...

    New Zealand landline phone numbers have a total of eight digits, excluding the leading 0: a one-digit area code, and a seven-digit phone number (e.g. 09 700 1234), beginning with a digit between 2 and 9 (but excluding 900, 911, and 999 due to misdial guards). There are five regional area codes: 3, 4, 6, 7, and 9.

  9. Telephone numbers in the Czech Republic - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    Operator for international phone calls: 133 003; Prefixes. The first 1-3 digits (after +420) of the telephone number indicates location or network. For mobile phones, since there is number portability, the mobile phone code only indicates the original operator.