Microsoft has run out of/had run out of IPv4 addresses for its cloud platform

To emphasise exactly how dire the need to move to IPv6, the next-generation of internet addressing, has become, Microsoft has started using non-USA IP addresses for its servers that are indeed hosted in the USA.

Over the weekend, Microsoft clarified the point in a blog posting when users were asking why, when they use Azure-hosted virtual machines, that these machines were receiving content from other websites localised for other countries, such as Brazil.

Microsoft’s answer was that it is having difficulty getting hold of IP addresses that should be used within the States.

“The result is that we will have to use IPv4 address space assigned to a non-US region to address services which may be in a US region,” Microsoft’s blog post clarifies.

Microsoft has since clarified the situation by stating that IPv4 inventory is a “dynamic situation” and “in the past, some customers were assigned non-US IPv4 addresses as a result of limited inventory.”

Next-generation IP

The migration to IPv6 is long overdue. Big players in Internet technology such as Cisco, Google and Microsoft have already been pushing for cooperation for the implementation of IPv6. Indeed the main parts of the Internet already run IPv6, and most company networks are capable of using IPv6, however the bottleneck remains (in the UK at least) with Internet connectivity, home routers and Internet providers.

More information on IPv6