Microsoft's Azure cloud service has run out of IPv4 addresses in the US, and it's borrowing from its Latin-American IP block.

Microsoft said that Azure customers may have noticed that virtual machines deployed in North America might think they are elsewhere, with web browsers bringing up international versions of a website, rather than the American one.

This is because IPv4 address space has been fully assigned in the United States, meaning there is no additional IPv4 address space available.