This is a free RWHOIS lookup tool, meant to make it easy to see who owns a specific IP address. Note that if there is not an RWHOIS server available, this lookup may fail. In this case, it is recommended that you do a general WHOIS lookup, which will give you the Internet Service Provider (ISP) responsible for the given IP. If you are trying to find the owner of a particular IP and there is no RWHOIS server available, you may need to contact the ISP and ask for assistance. If you are trying to report spam, there is normally an abuse email contact in the general whois lookup that you should reach out to.