Azure service tags
Public-cloud IP prefixes by service and region, the exact differences between Microsoft's weekly publications, and lists your firewall can read.
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Observed changes
Publication 421 · 3321 tags · checked 08:42 UTC · next 10 Oct 08:42 UTCNo observed change matches this selection. A baseline alone does not establish a change.
Service AzureCognitiveSearch · eastus3 · 1 IPv4, 1 IPv6 · tag revision 1
134.138.64.192/262603:1030:1402::100/121
Microsoft source JSON · Service-tag documentation · JSON of this selection