Try these network tools to get some information on websites: Forward / Reverse DNS Lookup and Whois Report.

Your IP address is 34.231.21.123

(1) - Forward / Reverse DNS Lookup :

The Domain Name System (DNS) is the way that Internet domain names are located and translated into Internet Protocol (IP) addresses. A domain name is a meaningful and easy-to-remember "handle" for an Internet address. The lists of domain names and IP addresses are distributed throughout the Internet. There is probably a DNS server within close geographic proximity to your access provider that maps the domain names in your Internet requests or forwards them to other servers in the Internet.

Examples : elkhazen.com, yahoo.co.jp, google.co.uk...

Examples : 216.40.33.117, 216.239.37.100...

(2) - Whois Report :

This is a program that tells you the owner of second-level domain names. It can also be used to find out whether a domain name is available or has already been taken. If you enter a domain name you are considering and the search result is "No match," the domain name is likely to be available.

Examples : elkhazen, yahoo, google...