The IP address of a website is the number that identifies each Internet domain, a kind of ID of all the domains that are registered in the network, and of course that domain IP is associated with an owner and saved on a server determined, and that is the exact information that IP Lookup gives you.
With IP Lookup you have a simple program that, starting with an IP that you provide, begins to track said IP and obtains information from the owner of said domain associated with the IP informing you of the corresponding ISP address or the data of the server where it has been registered.
You can free download IP Lookup 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.