Microsoft Azure uses 37 prefixes for SecurityCopilot.
Short answer
Microsoft Azure lists these prefixes under “SecurityCopilot”. 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.
Prefixes
What changed
No prefixes added or removed since we started tracking this list. Changes appear here the day after the provider publishes them.
Allowlist formats
nginx (first 5 prefixes)
allow 108.143.177.252/32; allow 13.71.177.225/32; allow 13.74.201.120/32; allow 172.173.16.66/31; allow 172.205.152.4/32; deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 108.143.177.252/32 -j ACCEPT iptables -A INPUT -s 13.71.177.225/32 -j ACCEPT iptables -A INPUT -s 13.74.201.120/32 -j ACCEPT iptables -A INPUT -s 172.173.16.66/31 -j ACCEPT iptables -A INPUT -s 172.205.152.4/32 -j ACCEPT
Generate the full list from the CSV, and refresh it on a schedule: providers add and retire prefixes often.
Sources
- Microsoft Azure: published IP ranges · checked 5 Nov 2026
- Microsoft Azure documentation