You can do what is called a "whois" (Who is) search. There are plenty of websites giving access to the publicly available databases that hold the information. Just do a Google search for "whois search". One such is
You type (or paste) just the "domain name", that is the bare web site address ignoring the http://www.
stuff at the start (example: able2know.org
), and assuming you did this correctly you get a list showing all the available information.