Investigation- Web pages visited

["Steve Barron" <thurgoodj187 () hotmail com>]

Hi

I am trying to investigate some possible corporate policy violations, mostly 
involving porn.  My IDS matches rules for certain criteria and looks for 
banned words in html.  When I get the ip, i can query it, but most of the 
time I get info about a hosting provider.  When I attempt to access the ip 
http://155.X.X.X i get either some generic page or a 404 error.  Is there 
any way to find out what sites are hosted at a given IP?  My logs have not 
been much help for this.

Thanks

Steve