The AWS status board, posted elsewhere in the comments, seems to think this is an AZ outage, not a regional one. Edit: although, one of our vendors that uses A

The AWS status board, posted elsewhere in the comments, seems to think this is an AZ outage, not a regional one. Edit: although, one of our vendors that uses AWS has said that they think ELB registration is impacted (but I don't recall if that's regional?) and R53 is impacted (which is supposed to be global, IIRC). Dunno how much truth there is to it as we don't use AWS directly.