Yeah, we both use
www.zoneedit.com to manage DNS records. While I use the free service (only 2 name servers, ns1 and ns2) Ogre pays for 1 additional nameserver (ns17 iirc), though, all three were down! For hours it seems.
Seems up again, not sure for how long. Hopefully, it is fixed and not just up for a bit. I have been working to get dns entries on my server working, to use as a fallback name server. Hopefully avoid this happening again.