I was wondering if there is any efficient way or any service (free or not) that may help me in order to identify companies behind IP addresses.
I figured out that in some cases Whois may be really helpful for that. Unfortunately, in a lot of cases the result given by Whois is an ISP (which I'm not surprised of).
Is there any way (service, tool) to get the result only if it is a "real" company ("real" company meaning not being an ISP)?
Is there any "blacklist" (regularly updated) of all the ISPs Whois may be returning, so that I could compare the result given with that blacklist to filter out the results being ISPs?
Once again my only goal is to have the information (company owning the IP address) only when it's available, without having to manually check if the Whois result is an ISP or not.
Thanks in advance for your help