Microsoft Azure
View on mapMicrosoft publishes Azure service tags and downloadable JSON for public IP ranges used by Azure services (distinct from Bing or M365 unless included in the same file).
Autonomous systems
AS8075
AS12076
Published ranges
Azure service tags & public IPs
Official feedMicrosoft publishes ServiceTags_Public JSON weekly; fetch the current file from Download Center (filename includes a date stamp that changes each release).
Azure CDN & Front Door - backend allowlisting
DocumentationMicrosoft documents using AzureFrontDoor.Backend and the downloadable service-tag JSON to restrict origins to Microsoft CDN and Front Door backends. Azure CDN from Edgio was retired January 2025; classic Microsoft CDN has a 2027 retirement milestone.