Search Engine IP Addresses
You can see the latest lists of search engine IP addresses and hostnames here:
Google IP List
List of the IP addresses of the various Googlebots and Mediabots. Last revised Tuesday, 20-May-2008 13:56:22 EDT Size: 4.0K
Yahoo IP List
List of the IP addresses of Yahoo/Inktomi bots. Last revised Monday, 18-May-2009 14:11:30 EDT Size: 11K
Lycos IP List
List of the IP addresses of Lycos bots. Last revised Tuesday, 20-May-2008 13:56:22 EDT Size: 580
MSN IP List
List of the IP addresses of MSN bots. Last revised Saturday, 21-Mar-2009 19:45:42 EDT Size: 5.4K
Alta Vista IP List
List of the IP addresses of Alta Vista bots. Last revised Tuesday, 20-May-2008 13:56:22 EDT Size: 1.9K
WiseNut IP List
List of the IP addresses of WiseNut bots. Last revised Tuesday, 20-May-2008 13:56:24 EDT Size: 1.6K
Ask IP List
List of the IP addresses of Ask/Teoma bots. Last revised Wednesday, 29-Oct-2008 19:10:12 EDT Size: 2.0K
Misc IP List
List of the IP addresses of various search engines' bots. Last revised Tuesday, 19-May-2009 15:15:34 EDT Size: 57K
Non Spiders
List of IP addresses and some User Agents of non-search engine spider bots, along with some other pertinent information. Last revised Tuesday, 20-May-2008 13:56:24 EDT Size: 6.3K