ActiveWhois

ActiveWhois is useful tool to find important information about suspicious web-sites or IRC/Instant Message/chat nickname. This network utility that allow finding information about owners of internet domains and IP addresses. You can obtain persons with postal adresses including country of who use domain or IP address. Unlike others WHOIS clients Active Whois do not need special skills to collect necessary information, you can investigate any IP address or web site including international top level domains and find who is owner and where it is placed just by one click. ActiveWhois intelligently researching information in about 70 WHOIS servers worldwide and can dynamically find correct server based on replies of other WHOIS services.