Among other things we use pingdom to monitor our data centers. Please have a look here
how the site has been doing in the last week: Pingdom Status
Please note that this is a live view on our data centers. Should you see a green check box behind a data center then that means that our servers were reachable by more than 20 locations around the world.
For a history of outages that preceded the existence of this page please visit our past outages page where we list all outages we experienced since our launch in January 2007. (There were one point five – in case you just care for a summary).
If you like you can use isup.me to see if INTERDUBS is down for you or everybody else as well.
This page might be helpful to identify problems with other sites and systems as well.