How to find the IP Address of a website or domain ?

nslookup command is used to find the server details. # nslookup [site URL]
Example # nslookup www.google.com Server:  dhcp3.equant.com Address:  10.239.221.56 Non-authoritative answer: Name:    www.l.google.com Addresses:  74.125.24.105, 74.125.24.106, 74.125.24.147, 74.125.24.99 , 74.125.24.103, 74.125.24.104 Aliases:  www.google.com