IP assignments have changed with the infrastructure changes they just made. Noted in another thread that my client is now using an IP I haven't seen it use since back around patch 2.2. Since Beta4, I have tracked 4 differnt IP's in use for my Midgard connection. This is the first time I've seen it go back to a previously used IP address (199.91.189.31). Both the .57 and .60 IP's that are noted at the ARR status page appear to no longer be a valid IP's for world servers--or at least those particular IP's appear to be down or otherwise inaccessible to a lot of players if they are still assigned as valid IP addresses.
There are about 15 IP's in the range of what we've previously seen in use that are no longer responding from a lot of locations (some I couldn't get to respond no matter where I hit them from, but they USED to respond), amongst several other blocks of IP addresses within that 199.91.189.xxx subnet. I forwarded a list of the IP's I found issues with to SE, and I got a reply back today that they have forwarded my report on to the proper department for review. If it is just a matter of downed IP's for some reason, hopefully it will be resolved soon.
Just to be sure your assigned IP's haven't changed as well, you guys may want to load resmon or run netstat to see just what IP you are actually connecting to, and then run some traces there just to be sure you are getting an accurate picture.