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  2. Reverse DNS lookup - Wikipedia

    en.wikipedia.org/wiki/Reverse_DNS_lookup

    It is important to note that this is the reverse order to the usual dotted-decimal convention for writing IPv4 addresses in textual form. For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google.

  3. 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 ...

  4. Blackhole server - Wikipedia

    en.wikipedia.org/wiki/Blackhole_server

    Reverse DNS queries are used to map IP addresses to domain names. They are PTR queries for subdomains of in-addr.arpa (for IPv4 addresses) [ 3 ] and ip6.arpa (for IPv6 addresses). [ 4 ] For example, to find the domain name associated with the IP address 203.0.113.22, one would send a PTR query for 22.133.0.203.in-addr.arpa .

  5. host (Unix) - Wikipedia

    en.wikipedia.org/wiki/Host_(Unix)

    When applied to a fully qualified domain name (FQDN) the host command will return information associated with that name such as its IP address and mail handling host. It can also be used to list all members of a domain. [2] The host command is also able to perform reverse IP lookups to find the FQDN associated with an IP address. [3]

  6. Forward-confirmed reverse DNS - Wikipedia

    en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS

    Forward-confirmed reverse DNS (FCrDNS), also known as full-circle reverse DNS, double-reverse DNS, or iprev, is a networking parameter configuration in which a given IP address has both forward (name-to-address) and reverse (address-to-name) Domain Name System (DNS) entries that match each other. This is the standard configuration expected by ...

  7. Talk:Reverse DNS lookup - Wikipedia

    en.wikipedia.org/wiki/Talk:Reverse_DNS_lookup

    The first external link, "FREE Reverse DNS Lookup Tool from BairesTools.com ", strikes me as an advertisement. The link also fails to mention that the site is in Spanish. While it may be a good (albeit common) resource, the link could be more descriptive and less promotional. -- 209.251.145.252 19:57, 17 August 2007 (UTC) [ reply ]

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

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

    They have access to databases all over the world, including landline numbers, as well as cell phones and Voice over IP numbers ... By using a free reverse phone search service, you can enter the ...

  9. .arpa - Wikipedia

    en.wikipedia.org/wiki/.arpa

    After serving the transitional purpose, it proved impractical to remove the domain. The domain in-addr.arpa had been installed for reverse DNS lookup of IP addresses. [5] Originally, the IETF intended that new infrastructure databases would be created in the top-level domain int.