The A record ,It is the IP of server where a domain is pointing. A server may be a dedicated, Shared or VPS Server. Whenever you visit a web site, send an email, post to Twitter or Facebook or other social websites. All Web links are pointing to specific IP that is called A record of the link.WHOIS LOOKUP sites provide information about domain IP Everyone can collect information about its Website Shared Hosting There will be no worry to lookup DOMAIN WHOIS