One of our name servers, ns3.eskimo.com, is currently down.
This was due to a combination of DNSSEC root-key change and my attempts to being lazy in resolving it. I attempted to purge / re-install the bind package thinking that would get me fresh conf files including the DNS key file however, Redhat had removed the package from the CentOS repository so I could not re-install.
I am in the process of moving this off of the CentOS6 server onto a Ubuntu based server. This may cause slow name resolution at times if ns3 is tried first until this is completed.