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2. Reverse DNS lookup - Wikipedia

   en.wikipedia.org/wiki/Reverse_DNS_lookup

   The modern "reverse DNS lookup" should not be confused with the now-obsolete "inverse query" (IQUERY) mechanism specified in RFC 1035: Inverse queries take the form of a single resource record (RR) in the answer section of the message, with an empty question section. The owner name of the query RR and its time to live (TTL

3. Whitepages (company) - Wikipedia

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

   Algard was searching for a friend's contact information, and the phone company gave him the wrong number. [4] He thought of an online email directory as an easier way to find people. [5] [6] Algard bought the Whitepages.com domain for $900, [7] [8] which he says was all of his savings at the time. [5]

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 mapping - Wikipedia

   en.wikipedia.org/wiki/Telephone_number_mapping

   A request is sent to the DNS for the NAPTR record of the domain name 1.2.3.4.5.6.7.8.9.4.3.e164.arpa. The query returns a result set of NAPTR records, as per RFC 3403. In the example above, the response is an address that can be reached in the Internet using the VoIP protocol SIP per RFC 3261.

6. WHOIS - Wikipedia

   en.wikipedia.org/wiki/WHOIS

   Currently, the Internet Corporation for Assigned Names and Numbers broadly requires that the mailing address, phone number and e-mail address of those owning or administering a domain name to be made publicly available through the "WHOIS" directories. The registrant's (domain owner's) contact details, such as address and telephone number, are ...

7. YellowPagesDirectory.Com - Wikipedia

   en.wikipedia.org/wiki/YellowPagesDirectory.Com

   YellowPagesDirectory.com is an online search engine and telephone directory. They encompass yellow (business) and residential (white) pages and currently feature over 28.5 million business listings throughout the United States. [1] Users of the site are able to add, edit, and delete their Business and Residential listings.