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azure · Windows365

Microsoft Azure uses 754 prefixes for Windows365.

Last updated 6 Nov 2026 from Microsoft Azure’s own list (file dated 2026-11-02 (change 425))

Short answer

Microsoft Azure lists these prefixes under “Windows365”. Microsoft publishes Azure’s ranges weekly as Service Tags: named groups such as AzureCloud, Storage, Sql or AzureFrontDoor.Frontend, each a list of prefixes. We import the global (non-regional) tags.

IPv4 prefixes754
IPv6 prefixes0
Regions in the first 100—
Fetched by peekip6 Nov 2026

Prefixes

PrefixRegion / locationService
102.133.127.119/32—Windows365
102.133.127.186/31—Windows365
102.133.255.104/29—Windows365
102.133.255.112/30—Windows365
102.37.64.186/31—Windows365
102.37.66.104/30—Windows365
102.37.66.108/31—Windows365
102.37.66.112/30—Windows365
102.37.72.206/31—Windows365
102.37.73.104/30—Windows365
102.37.73.108/31—Windows365
102.37.73.112/30—Windows365
104.208.151.24/31—Windows365
104.208.151.28/30—Windows365
104.208.151.4/30—Windows365
104.208.18.120/30—Windows365
104.208.18.124/32—Windows365
104.208.18.73/32—Windows365
104.208.18.74/31—Windows365
104.208.18.76/30—Windows365
104.208.203.122/31—Windows365
104.208.203.124/30—Windows365
104.208.203.208/28—Windows365
104.208.203.224/29—Windows365
104.208.207.220/30—Windows365
104.208.231.146/31—Windows365
104.211.146.71/32—Windows365
104.211.147.244/30—Windows365
104.211.81.30/31—Windows365
104.214.23.128/29—Windows365
104.214.23.136/32—Windows365
104.40.170.240/30—Windows365
104.40.170.244/31—Windows365
104.40.170.248/30—Windows365
104.40.170.70/31—Windows365
104.45.216.244/32—Windows365
104.45.217.109/32—Windows365
104.45.217.173/32—Windows365
104.45.217.253/32—Windows365
104.45.218.166/32—Windows365
104.45.219.11/32—Windows365
104.46.163.225/32—Windows365
104.46.163.228/30—Windows365
104.46.165.32/31—Windows365
104.46.165.34/32—Windows365
104.46.165.36/30—Windows365
108.143.177.253/32—Windows365
108.143.177.254/31—Windows365
108.143.178.32/29—Windows365
13.66.149.86/31—Windows365
Showing 50 of 754 prefixes All prefixes (CSV)

What changed

  • 4 Nov 2026
    + 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
+ 104.208.151.24/31
+ 104.208.151.28/30
+ 104.208.151.4/30
+ 104.208.18.120/30
+ 104.208.18.124/32
+ 104.208.18.73/32
+ 104.208.18.74/31
+ 104.208.18.76/30
+ 104.208.203.122/31
+ 104.208.203.124/30
+ 104.208.203.208/28
+ 104.208.203.224/29
+ 104.208.207.220/30
+ 104.208.231.146/31
+ 104.211.146.71/32
+ 104.211.147.244/30
+ 104.211.81.30/31
+ 104.214.23.128/29
+ 104.214.23.136/32
+ 104.40.170.240/30
+ 104.40.170.244/31
+ 104.40.170.248/30
+ 104.40.170.70/31
+ 104.45.216.244/32
+ 104.45.217.109/32
+ 104.45.217.173/32
+ 104.45.217.253/32
+ 104.45.218.166/32
+ 104.45.219.11/32
+ 104.46.163.225/32
+ 104.46.163.228/30
+ 104.46.165.32/31
+ 104.46.165.34/32
+ 104.46.165.36/30
+ 108.143.177.253/32
+ 108.143.177.254/31
+ 108.143.178.32/29
+ 13.66.149.86/31
+ 13.66.151.200/30
+ 13.66.151.204/32
+ 13.67.15.193/32
+ 13.67.20.250/31
+ 13.67.20.252/30
+ 13.67.21.128/30
+ 13.67.21.132/32
+ 13.69.116.101/32
+ 13.69.239.106/31
+ 13.70.137.229/32

Allowlist formats

nginx (first 5 prefixes)
allow 102.133.127.119/32;
allow 102.133.127.186/31;
allow 102.133.255.104/29;
allow 102.133.255.112/30;
allow 102.37.64.186/31;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 102.133.127.119/32 -j ACCEPT
iptables -A INPUT -s 102.133.127.186/31 -j ACCEPT
iptables -A INPUT -s 102.133.255.104/29 -j ACCEPT
iptables -A INPUT -s 102.133.255.112/30 -j ACCEPT
iptables -A INPUT -s 102.37.64.186/31 -j ACCEPT

Generate the full list from the CSV, and refresh it on a schedule: providers add and retire prefixes often.

Sources

  1. Microsoft Azure: published IP ranges · checked 6 Nov 2026
  2. Microsoft Azure documentation