Though AT&T's had issues tonight and before with FFXIV, I don't think this is solely their issue alone.

A few FC members I spoke to that use other ISPs such as Cox and Comcast have stated issues as well, and it seems NTT's nodes in California are the culprit.

Still, if a major ISP is doing this, that's something you'd have to talk to them about.

My issues only cropped up today. The weekend was totally fine.