Unable to get to manage.norton.com, can't get phone # list or chat help

I have been unable to connect to manage.norton.com to install the upgrade from 360 to 360 multi device I recently purchased.

I have tried clearing the cache, used Firefox, Chrome and IE, and rebooting.  The site does not return a ping (DNS failure).

I cannot get a phone # to call as this also apparently uses the site get the local phone #s, as does chat.

Is this a common site failure or my problem?

Suggestions?