KQL has some IPV4 features. A new one last month is IPV4_is_match : https://docs.microsoft.com/en-us/azure/kusto/query/ipv4-is-matchfunction Two examples (more here https://github.com/CliveW-MSFT/KQLpublic/blob/master/Queries/CIDRexamples ): 1.Using the SigninLogs Table as data. This example takes an IP Address from the log and sees if it is in an allowed range or not.
