Microsoft Azure uses 1,292 prefixes for AzureSiteRecovery.
Short answer
Microsoft Azure lists these prefixes under “AzureSiteRecovery”. 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 102.133.124.64/28; allow 102.133.156.96/28; allow 102.133.160.44/32; allow 102.133.218.176/28; allow 102.133.251.160/28; deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 102.133.124.64/28 -j ACCEPT iptables -A INPUT -s 102.133.156.96/28 -j ACCEPT iptables -A INPUT -s 102.133.160.44/32 -j ACCEPT iptables -A INPUT -s 102.133.218.176/28 -j ACCEPT iptables -A INPUT -s 102.133.251.160/28 -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