Some of it seems to be down. I use Gandi for my DNS, I can still access my site at www.example.com but the redirection I have from example.com to www.example.com doesn't work.
Perhaps it's an HTTP-based redirect, and that's why it's down whereas DNS is up?
It is similar how the web interface for email has technically nothing to do with the email infrastructure and email protocols, but as a service it is packaged together with email.