Quick start
- Enter a tag, region, system service or individual IP address.
- Select Search snapshot and choose a matching tag.
- Inspect, copy or export the published IPv4 and IPv6 prefixes.
Lookup
- Search by service-tag name, Azure region or system service.
- Enter an individual IPv4 or IPv6 address to find every matching tag.
- Select a result to inspect, copy or export its published CIDR prefixes.
Compare snapshots
Load an older Microsoft service-tags JSON file to see prefixes added and removed per tag. The comparison runs locally and accepts either Microsoft’s original shape or this project’s normalized snapshot.
Data freshness
The dataset is refreshed from Microsoft’s official download page with pnpm refresh:azure-service-tags. Each refresh records the source URL, date, global change number and per-tag metadata. The refresh script refuses an unexpectedly large tag-count drop as a guard against publishing a partial response.
This is published reference data, not a live Azure control-plane API. Check the displayed snapshot date before using the ranges in a production change.
Privacy and saved data
Searches and snapshot comparisons stay in the browser. The tool does not use localStorage.