// Cloud region

westus3

Microsoft · US West 3

Region details

Partition: Public
Airport code: PHX
Country: US
Nearest city: Phoenix, United States
Services: ActionGroupAzureApiManagementAzureAppServiceAzureAppServiceManagementAzureArcInfrastructureAzureAttestationAzureBackupAzureBotServiceAzureCognitiveSearchAzureConnectorsAzureContainerRegistryAzureCosmosDBAzureDataExplorerManagementAzureDevOpsAzureDigitalTwinsAzureEventGridAzureEventHubAzureIoTHubAzureKeyVaultAzureMachineLearningAzureMonitorAzureOpenDatasetsAzurePortalAzureResourceManagerAzureSQLAzureSecurityCenterAzureServiceBusAzureSignalRAzureStorageBatchNodeManagementDataFactoryGatewayManagerHDInsightLogicAppsMicrosoftCloudAppSecurityMicrosoftContainerRegistryPowerBIPowerQueryOnlineSCCserviceServiceFabricStorageSyncServiceWindowsVirtualDesktop

Published prefixes

741 prefixes in Fastah's public IP data (534 IPv4, 207 IPv6). The first 100, in address order:

4.148.0.0/164.148.24.244/304.148.24.248/324.148.25.0/274.148.25.32/284.148.214.196/304.148.214.200/294.149.0.0/184.149.20.0/244.227.0.0/174.227.74.141/324.227.75.85/324.227.76.10/324.227.76.97/324.227.76.180/324.227.77.19/324.227.77.116/324.227.77.128/32

Show 82 more

4.227.77.218/324.227.77.224/324.227.78.222/324.227.78.227/324.236.0.0/174.236.45.223/324.236.46.212/324.236.55.86/324.236.55.100/324.236.112.0/294.236.112.8/304.236.112.12/304.236.112.48/294.236.112.64/264.236.112.224/274.236.114.8/294.236.114.96/284.242.128.0/174.249.0.0/179.129.0.0/239.129.4.0/239.129.10.0/239.129.14.0/239.129.50.0/259.129.56.224/279.129.57.240/289.129.80.0/219.129.114.128/259.129.117.192/269.129.128.0/209.129.229.0/249.129.244.128/269.129.246.64/279.129.248.96/2813.104.253.48/2813.105.66.32/2713.105.66.128/2813.105.66.160/2713.105.74.0/2713.105.74.32/2813.105.74.64/2713.105.102.224/2713.105.103.0/2813.105.103.32/2720.14.0.0/1720.14.27.141/3220.14.120.8/2920.14.121.160/2920.14.121.184/2920.14.121.192/2720.14.121.240/2820.14.122.192/2620.14.125.128/2520.14.126.128/2520.14.127.0/2620.17.72.0/2120.18.184.0/2120.20.55.0/2720.20.58.112/2820.25.128.0/1820.33.29.0/2420.33.30.0/2420.33.138.0/2420.33.164.0/2420.33.189.0/2420.33.216.0/2420.38.0.0/2020.38.32.0/2020.38.160.0/2020.40.24.0/2120.40.24.16/3220.40.24.21/3220.40.24.23/3220.40.24.30/3120.40.24.34/3220.40.24.37/3220.40.24.38/3120.40.24.46/3220.40.24.49/3220.40.24.50/3120.40.24.54/3120.40.24.62/31

Data as of 2026-11-05, from Fastah's daily geofeed crawl.

Source & provenance. From Microsoft's published IP range files, placed at the region's nearest city. Fastah lists them and does not edit them.