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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, 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. Its purpose is to allow the telephone number of a subscriber identified by ...

  3. 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 ...

  4. NTPC Limited - Wikipedia

    en.wikipedia.org/wiki/NTPC_Limited

    NTPC Limited, formerly known as National Thermal Power Corporation, is an Indian central Public Sector Undertaking (PSU) under the ownership of the Ministry of Power and the Government of India, who is engaged in the generation of electricity and other activities.

  5. National Integrated Directory Inquiry Service - Wikipedia

    en.wikipedia.org/wiki/National_Integrated...

    The directory will be available to anyone who calls a special five-digit number and via the Internet. [1] It will not be made available in print form. All land line numbers will be included in the directory by default, with people having the option to opt out if they so choose. Mobile phone subscribers, however, will have to opt in to be ...

  6. E.123 - Wikipedia

    en.wikipedia.org/wiki/E.123

    The canonical format is used by the Telephony API (TAPI), a Windows programming interface for dial-up fax, modem, and telephone equipment. Depending on the user's current location, the Windows' Dial-Up Networking (DUN) component applies a set of dialing rules to transform the canonical phone number into a locally dialable calling sequence for ...

  7. List of United States telephone companies - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    In the following states and regions, the primary local carrier is not an RBOC: Lumen Technologies, in addition to its role as the BOC in the areas of 14 states gained from its acquisition of Qwest, Lumen serves other non-ex-Bell local exchanges in those states, as well as some in Florida and the Las Vegas metropolitan area in Nevada.

  8. NTPC Ramagundam - Wikipedia

    en.wikipedia.org/wiki/NTPC_Ramagundam

    NTPC Ramagundam, a part of National Thermal Power Corporation, [1] is a 2,600 megawatt (MW) Super thermal power station situated at Ramagundam in Peddapalli district in Telangana, India. It is the current largest power station in South India.

  9. X.500 - Wikipedia

    en.wikipedia.org/wiki/X.500

    The current use of X.509v3 certificates outside the Directory structure loaded directly into web browsers was necessary for e-commerce to develop by allowing for secure web based (SSL/TLS) communications which did not require the X.500 directory as a source of digital certificates as originally conceived in X.500 (1988). One should contrast the ...