I would like to get up-to-date information on Google's index of a website, and it seems that results vary depending on which datacentre happens to process your search query.

+1  A: 

You can use one of the many tools designed specifically for this. One of them is Google Datacenter Search at iWebTool.

(It's really all about getting a list of data center IPs and sending the same GET variable to them as to

Christian Davén
Great! I see that I am limited to 5 searches per hour. Are there any other limitations, for example can I use this every day?
It looks like manually inserting the IP address into the address bar is the simplest solution once you have gathered them.