Quis? is a smart WHOIS information searching software. With thousands of information source providers scattered around the Internet, it is not always an easy job to find detailed WHOIS information for a domain name or an IP address. It retrieves information from various smartly chosen WHOIS sources to get the best possible result with a single users query. Currently, it searches from 234 (and counting) WHOIS hosts worldwide. It virtually searches all domains in the world.