Microsoft Azure uses 541 prefixes for AzureSentinel.

Prefixes

What changed

• 21 Oct 2026

  + 135.232.89.152/31
  + 135.232.93.160/31
  + 135.233.81.89/32
  + 172.129.191.0/26
  + 172.134.21.224/28
  + 172.143.2.0/27
  + 172.161.112.232/30
  + 172.161.113.32/27
  + 172.161.113.64/28
  + 172.165.101.218/31
  + 172.165.101.240/28
  + 172.165.118.0/27
  + 172.165.118.32/30
  + 172.165.118.36/32
  + 172.186.159.188/30
  + 172.186.166.128/27
  + 172.186.166.80/28
  + 172.187.46.74/31
  + 172.187.46.78/32
  + 172.199.131.56/30
  + 20.15.210.192/26
  + 4.147.36.152/30
  + 4.161.15.0/27
  + 4.161.15.32/28
  + 4.161.181.106/31
  + 4.161.181.184/30
  + 4.186.5.32/27
  + 4.186.90.105/32
  + 4.186.90.106/31
  + 4.188.127.36/30
  + 4.195.181.255/32
  + 4.195.182.232/31
  + 4.199.60.62/31
  + 4.199.61.48/30
  + 4.199.63.0/27
  + 4.200.218.210/32
  + 4.200.218.224/28
  + 4.209.235.6/31
  + 4.209.6.120/30
  + 4.213.110.0/28
  + 4.213.110.16/31
  + 4.226.69.138/31
  + 4.247.48.181/32
  + 4.247.48.190/31
  + 4.247.49.56/30
  + 4.247.49.64/27
  + 4.247.49.96/28
  + 40.84.114.36/30
  + 48.204.199.192/26
  + 48.209.198.8/31
  + 48.214.138.152/30
  + 51.4.10.166/31
  + 51.4.10.168/30
  + 51.56.233.208/28
  + 51.56.233.224/27
  + 51.58.117.32/27
  + 51.58.117.64/28
  + 51.58.164.63/32
  + 51.58.175.144/28
  + 51.58.175.160/27
  

Allowlist formats

allow 102.133.139.160/32;
allow 104.208.197.204/30;
allow 104.208.197.224/27;
allow 104.208.199.0/30;
allow 108.140.47.196/31;
deny all;

iptables -A INPUT -s 102.133.139.160/32 -j ACCEPT
iptables -A INPUT -s 104.208.197.204/30 -j ACCEPT
iptables -A INPUT -s 104.208.197.224/27 -j ACCEPT
iptables -A INPUT -s 104.208.199.0/30 -j ACCEPT
iptables -A INPUT -s 108.140.47.196/31 -j ACCEPT

Sources

1. Microsoft Azure: published IP ranges · checked 5 Nov 2026
2. Microsoft Azure documentation