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Azure service tags

Public-cloud IP prefixes by service and region, the exact differences between Microsoft's weekly publications, and lists your firewall can read.

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Service Region Exact tag Clear

Observed changes

Publication 426 · 3398 tags · checked today 01:16 UTC · next 13 Nov 01:16 UTC

Most recent 6 observation dates · retained from 7 Oct 2026 to 11 Nov 2026. Choose any date in that range.

3 Nov
Windows365Added tag · publication 424 → 425

Addresses+3,398 IPv4 addressesnone dropped
Prefixes+754
- Added 102.133.127.119/32
- Added 102.133.127.186/31
- Added 102.133.255.104/29
- Added 102.133.255.112/30
- Added 102.37.64.186/31
- Added 102.37.66.104/30
Full diff · 754 published values
ID: absent → Windows365; Region: absent → ; Region ID: absent → 0; Service: absent → Windows365; Platform: absent → Azure; Network features: absent → API, FW, NSG, UDR

All of them as one list: IPv4 · IPv6 · both

Service Windows365 · global · 754 IPv4, 0 IPv6 · tag revision 1 · used by API, FW, NSG, UDR · last changed 3 Nov

102.133.127.119/32
102.133.127.186/31
102.133.255.104/29
102.133.255.112/30
102.37.64.186/31
102.37.66.104/30
102.37.66.108/31
102.37.66.112/30
102.37.72.206/31
102.37.73.104/30
102.37.73.108/31
102.37.73.112/30

This tag as a list

Microsoft source JSON · Service-tag documentation · JSON of this selection