Microsoft

Microsoft operates data centers worldwide for its Azure cloud services, supporting regions and availability zones in many countries.

Generally speaking Microsoft Azure architecture consists of regions that has one or more availability zones. An availability zone may consist of one or more data centers, but a Microsoft data center can only be included in one availability zone. So if your services are spread across multiple availability zones, you are sure to have your data placed in different physical data centers at different locations. More information about the structure and its data centers can be found at the Azure website.