It does both. You can use whois to lookup IP or domain name.
I suspect it most likely was: "we already have whois database, let's use it for domains as well."
I suspect it most likely was: "we already have whois database, let's use it for domains as well."
Domains and IPs used to be closely tied together, but that’s not the case anymore - when you WHOIS the IP lizdenys.com is at, you don’t get anything, but when you WHOIS the name lizdenys.com, you get information about me. Getting my personal information when you WHOIS lizdenys.com isn’t in the spirit of getting the information in the original WHOIS directory.