How many spiders with the same name?
Google likes naming their spiders and giving the same name to a whole cluster of spiders. One thing that you can do with this is look up all the IP Addresses with the same name and evaluate those IPs as well. Here is the basic process:
Find one IP Address that the reverse DNS lookup resolves to a googlebot.com address.
Then perform a standard DNS lookup on the name to find all the other IP Addresses that use that name.
While doing this I would find that google sometimes has as many as 30 IP addresses with the same name. I would also see that I some of those IP Addresses stopped by this month, but others may have stopped by 6 or more months ago. (Have I mentioned I love having my logs in a MySQL server?) In any case, I was able to verify that those spider were active at some point in the not too distant past. So they got added as well.
