Microsoft Azure uses 222 prefixes for SerialConsole.
Short answer
Microsoft Azure lists these prefixes under “SerialConsole”. 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 102.37.166.222/31; allow 102.37.86.192/31; allow 102.37.86.194/32; allow 108.140.5.172/32; allow 130.213.49.6/31; deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 102.37.166.222/31 -j ACCEPT iptables -A INPUT -s 102.37.86.192/31 -j ACCEPT iptables -A INPUT -s 102.37.86.194/32 -j ACCEPT iptables -A INPUT -s 108.140.5.172/32 -j ACCEPT iptables -A INPUT -s 130.213.49.6/31 -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