How to find a hostname of a site?

trythis0ne.com is the host name of the site trythis0ne.com

The same domain (host) name may have multiple IP addresses. Depending when and where you ask from you may be given a different IP. If you visit popularsite.com in the USA you'll possibly be given an IP address in North America, whereas if you do the same in New Zealand you may get a more local server in Australia. Similarly several different IP addresses for the domain may be handed out to load balance between server farms and routes to the farms.

The things translating domain names to IP addresses are name servers, ns1.livedns.co.il is the name server that gave you 62.219.78.115 as the IP address for trythis0ne.com. ns1.livedns.co.il was chosen by a number of complex rules, possibly because you're in Israel and that is your configured name server, possibly because your configured name server decided to defer to ns1.livedns.co.il.

So the simple answer is, in http://whatever.com/blah/blah/blah, whatever.com is the domain name, which is the same as the host name.

Note that many name servers are configured to serve the same IP address for www.whatever.com and whatever.com. Also name servers store several IP addresses for a domain and the process of inquiring for a name includes the purpose of the IP, so the IP address used to server http://whatever.com/ may be different for the one used to route mail to whoever@whatever.com.

To look up the hostname open cmd.exe

windows vista/7 (start > type cmd > open)

windows xp (start > run > cmd)

then in the cmd window type

nslookup <ipaddress> OR nslookup <URL> and it will display all information of the ip or url

For FTP, hostname is same as your domain name: ex. yourdomainname.com

For Email and Database, host name is mostly 'localhost'