Sign inMonitor a domain
azure · AzureCognitiveSearch

Microsoft Azure uses 169 prefixes for AzureCognitiveSearch.

Last updated 4 Nov 2026 from Microsoft Azure’s own list (file dated 2026-11-02 (change 425))

Short answer

Microsoft Azure lists these prefixes under “AzureCognitiveSearch”. 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 prefixes86
IPv6 prefixes83
Regions in the first 100—
Fetched by peekip4 Nov 2026

Prefixes

PrefixRegion / locationService
102.133.217.128/26—AzureCognitiveSearch
102.37.84.192/26—AzureCognitiveSearch
13.87.32.28/32—AzureCognitiveSearch
134.138.64.192/26—AzureCognitiveSearch
158.23.96.192/26—AzureCognitiveSearch
172.129.72.192/26—AzureCognitiveSearch
172.193.3.128/25—AzureCognitiveSearch
172.194.64.192/26—AzureCognitiveSearch
172.198.80.192/26—AzureCognitiveSearch
172.204.152.192/26—AzureCognitiveSearch
191.233.9.0/26—AzureCognitiveSearch
191.235.225.64/26—AzureCognitiveSearch
20.113.251.64/26—AzureCognitiveSearch
20.150.160.128/26—AzureCognitiveSearch
20.17.112.192/26—AzureCognitiveSearch
20.17.48.192/26—AzureCognitiveSearch
20.189.106.128/26—AzureCognitiveSearch
20.192.161.0/26—AzureCognitiveSearch
20.192.225.64/26—AzureCognitiveSearch
20.21.32.192/26—AzureCognitiveSearch
20.215.0.192/26—AzureCognitiveSearch
20.217.248.192/26—AzureCognitiveSearch
20.217.40.192/26—AzureCognitiveSearch
20.36.120.128/26—AzureCognitiveSearch
20.37.156.128/26—AzureCognitiveSearch
20.37.193.192/26—AzureCognitiveSearch
20.37.224.128/26—AzureCognitiveSearch
20.37.64.128/26—AzureCognitiveSearch
20.38.136.128/26—AzureCognitiveSearch
20.38.84.0/26—AzureCognitiveSearch
20.39.8.192/26—AzureCognitiveSearch
20.41.193.64/26—AzureCognitiveSearch
20.41.4.128/26—AzureCognitiveSearch
20.41.65.64/26—AzureCognitiveSearch
20.42.129.192/26—AzureCognitiveSearch
20.42.225.192/26—AzureCognitiveSearch
20.42.4.128/26—AzureCognitiveSearch
20.43.130.128/26—AzureCognitiveSearch
20.43.41.64/26—AzureCognitiveSearch
20.43.65.64/26—AzureCognitiveSearch
20.45.112.128/26—AzureCognitiveSearch
20.45.192.128/26—AzureCognitiveSearch
20.72.17.0/26—AzureCognitiveSearch
4.232.24.192/26—AzureCognitiveSearch
40.119.11.0/26—AzureCognitiveSearch
40.64.8.64/26—AzureCognitiveSearch
40.67.48.128/26—AzureCognitiveSearch
40.74.30.0/26—AzureCognitiveSearch
40.80.169.64/26—AzureCognitiveSearch
40.80.186.192/26—AzureCognitiveSearch
Showing 50 of 169 prefixes All prefixes (CSV)

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 102.133.217.128/26;
allow 102.37.84.192/26;
allow 13.87.32.28/32;
allow 134.138.64.192/26;
allow 158.23.96.192/26;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 102.133.217.128/26 -j ACCEPT
iptables -A INPUT -s 102.37.84.192/26 -j ACCEPT
iptables -A INPUT -s 13.87.32.28/32 -j ACCEPT
iptables -A INPUT -s 134.138.64.192/26 -j ACCEPT
iptables -A INPUT -s 158.23.96.192/26 -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 4 Nov 2026
  2. Microsoft Azure documentation