Whois (literally "Who?") is a tool for querying information bases (called registries) regarding domain names & IP addresses. The data contained in these databases do not include any form of warranty but generally allow to find the owner of a domain or IP address, especially in case of dispute.
Read More..
Nslookup (Name System Look Up) is a tool for querying a name server to obtain information about domain or a host and this diagnose possible DNS configuration problems.Invoked without arguments, the nslookup displays the name and IP address of primary name server and displays a command prompt for the query. Simple type a domain at the prompt to display its characteristics.
Read More..