Non-RFC 1918 space now allowed in a virtual network
Published date: 17 November, 2014
We are announcing that non-RFC 1918 space (such as public IP address blocks) can be added to the virtual network. Until now, users were allowed to bring only RFC 1918 address blocks (private space) as their virtual network address space in Azure, but this restriction is now removed. All IP blocks in the virtual network will only be routable within the customer's network, and they won't be reachable from outside.