From time to time, Stack Exchange makes improvements to our network infrastructure. One change we're making in the coming weeks will include new IP addresses for most, if not all, of our public Stack Exchange network sites and web properties.
Expect the changes to start on or after September 19 and continue for a few weeks until all the migrations are complete.
Since we're sure someone will notice and ask if that's intentional, we thought we'd let you know.
These changes should be invisible to users of the website. While we don't expect any downtime or technical issues, please use the regular channels for reporting any problems.