Point your browser to the American Registry for Internet Numbers WHOIS Database Search web page at https://ws.arin.net/whois/. ARIN registers every IP number in the United States and Canada. Four other entities register numbers in other regions of the world. Even if the IP number you need to look up is registered in another country, ARIN can tell you the address.
Type the IP number in the "Search ARIN WHOIS for: ?" field and press the "Submit Query" button.
Scroll down the screen until you see the address listed. The address usually appears near the top of the page.