Windows Azure Domain Name System Improvements
When you publish an application to Windows Azure, it gets its own subdomain in cloudapp.net. In order to make name resolution even faster (particularly outside the USA), the Domain Name System (DNS) used by Azure is moving to a new globally distributed infrastructure. As the article mentions, there is no customer action required. http://blogs.msdn.com/b/windowsazure/archive/2010/09/24/windows-azure-domain-name-system-improvements.aspx