18:46 UTC – Our systems team is currently investigating a ‘Domain not found’ error that is affecting some sites. We are actively monitoring the situation and will update this post with more information as we have it.

18:56 UTC – The issue has been resolved. This was caused by a security update related to the Dallas, TX datacenter and one of the edge servers failing to repopulate the domain mapping. We will be adding additional checks into the system to prevent this issue from happening again in the future.