If I have an ip address, how I can know the details of the ip address.
e.g. the domain, the website address

Hello zenoyiu-ga,

Thank-you for your question.

One of the best places on the internet to discover more about an IP
address is http://www.dnsstuff.com

This site has a number of easy-to-use tools all located on one page. 
For instance if you wish to discover who owns the IP address that you
have try using one of the whois tools.

Another simple-to-use site is http://www.nwtools.com  Click the
"Express" radio button, enter your IP address in the text field under
the table and click submit, the site then tries to discover as much
information on the IP address as possible.

Other similar sites include:
http://www.infosyssec.com/infosyssec/ipsectools.htm
http://www.samspade.org/

If you require any further assistance please do not hesitate to ask
for clarification.

Further information on IP Addresses:
http://en.wikipedia.org/wiki/IP_address
http://computer.howstuffworks.com/question549.htm