Enter a valid IP address to lookup the reverse DNS by searching domain name registry and registrar tables. IP addresses are four numbers in the range of 0 to 255 separated by periods.
eg. 123.123.123.123
You may be able to identify the domain name of a spammer sending you spam email or the domain name of a computer trying to break into your firewall or someone trying to hack your system.
You may also be able to use this information to determine the name of the internet service provider assigned to a particular IP address.
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Reverse DNS is the opposite of forward DNS, which is used to translate hostnames to IP addresses.
Internet names are the names which we use to refer to hosts on the Internet, such as www.tldspy.com and www.computeracademy.org.
IP addresses are the numbers which Internet routers use to move traffic across the Internet, such as 216.111.138.115 and 216.76.204.117.
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