A simple tool built in PHP to lookup IP information.
Across the Internet, the .in-addr.arpa (inverse address) domain is used for reverse mapping for Internet numbers, translating the IP address to a hostname.
A typical DNS lookup is used to determine which IP address is associated with a hostname. A reverse DNS lookup is used for the opposite, to determine which hostname is associated with an IP address. Sometimes reverse DNS lookups are required for diagnostic purposes. Today,…