gettin a domain name or info of an IP address.

[MistaSmart]

I have a list of IP addresses. However, since IP's are not always permanently on the internet, I want to know which server/domain this IP belongs to. In another word, I want the server's domain or IP address. I can't use the function gethostbyaddr(IP) because the IP's are not always used. So given an IP address, i want to know its server. How would I be able to do this? any help would b appreciated.

 

[babel]

Software:

McAfee NeoTrace Pro delivers a powerful tool for checking information on internet locations. You can trace any computer on the internet simply by entering an email, IP address or URL. The display shows you the route between you and the remote site including all intermediate nodes and their registrant information.
McAfee NeoTrace is the world's most popular Internet tracer, used by law enforcement, ISPs, and network professionals, yet easy enough for the home user. Explore the powerful new features designed to make our most popular product even easier to use!

Features



Internet Explorer Integration Website tracing is just a click away with our IE browser integrated Trace Button.
Variety of Graphical Information The Node View complements improvements in our existing Map and List Views, offering users a wide range of graphical data for precision tracing.
Detailed Map View Map View shows most detailed available map for current view using expanded regional information.
Streamlined List View Node data is simple to understand with an integrated graph and an array of user-configurable data columns.
Expanded Geographical Data Improves accuracy of node placement with increased server based lookups for all traces.
HackerWatch.org Event Reporting When using McAfee NeoTrace in conjunction with a firewall it is simple to submit event reports to HackerWatch right from McAfee NeoTrace.
Mail Server Tracing Email address entry allows McAfee NeoTrace to locate the mail server for that address.
Many Save Formats Allows trace data, maps or both to be saved in formats such as JPG, PNG, BMP, HTML, RTF, and plain text