// Cloud region

westcentralus

Microsoft · US West Central

Region details

Partition: Public
Airport code: CYS
Country: US
Nearest city: Cheyenne, United States
Services: ActionGroupAzureApiManagementAzureAppServiceAzureAppServiceManagementAzureArcInfrastructureAzureAttestationAzureBackupAzureBotServiceAzureCognitiveSearchAzureConnectorsAzureContainerRegistryAzureCosmosDBAzureDataExplorerManagementAzureDevOpsAzureDevSpacesAzureDigitalTwinsAzureEventGridAzureEventHubAzureIoTHubAzureKeyVaultAzureMachineLearningAzureMonitorAzureOpenDatasetsAzurePortalAzureResourceManagerAzureSQLAzureSecurityCenterAzureServiceBusAzureSignalRAzureStorageAzureUpdateDeliveryBatchNodeManagementDataFactoryGatewayManagerHDInsightLogicAppsMicrosoftCloudAppSecurityMicrosoftContainerRegistryPowerBIPowerPlatformInfraPowerQueryOnlineSCCserviceServiceFabricStorageSyncServiceWindowsVirtualDesktop

Published prefixes

743 prefixes in Fastah's public IP data (576 IPv4, 167 IPv6). The first 100, in address order:

4.255.128.0/174.255.138.74/324.255.144.104/324.255.145.22/324.255.146.128/324.255.147.5/324.255.160.17/324.255.161.16/324.255.161.37/324.255.162.19/324.255.162.134/324.255.168.251/324.255.169.151/324.255.169.215/324.255.178.108/324.255.192.31/324.255.192.94/324.255.193.22/32

Show 82 more

4.255.195.186/324.255.216.225/324.255.218.227/324.255.219.16/324.255.219.152/324.255.225.20/324.255.225.35/329.129.45.128/259.129.52.128/269.129.67.192/269.129.88.0/219.129.104.0/229.129.111.0/249.129.115.128/259.129.152.0/219.129.188.0/229.129.214.0/239.129.232.0/2513.71.192.0/1813.71.192.0/2713.71.193.0/2713.71.193.32/2913.71.194.0/2613.71.194.64/2713.71.194.96/2813.71.194.112/3013.71.194.116/3113.71.194.120/2913.71.194.128/2613.71.194.192/2713.71.194.224/2913.71.194.232/2913.71.194.240/2813.71.195.32/2813.71.195.48/2913.71.195.64/2613.71.195.128/2713.71.195.160/2713.71.195.192/2713.71.196.32/2813.71.196.48/2913.71.196.56/2913.71.196.64/2813.71.196.80/2813.71.196.160/3013.71.196.192/2713.71.196.224/2713.71.198.0/2413.71.199.0/2813.71.199.96/2813.71.199.112/3013.71.199.116/3213.71.199.117/3213.71.199.128/2713.71.199.160/2813.71.199.192/2713.71.200.64/2813.71.200.96/2813.71.200.240/2813.71.202.16/2813.71.202.32/2813.71.202.64/2713.77.192.0/1913.77.219.128/3213.77.220.134/3213.78.128.0/1713.78.129.154/3213.78.130.69/3213.78.132.82/3213.78.135.15/3213.78.135.84/3213.78.135.117/3213.78.145.2/3213.78.145.11/3213.78.145.25/3213.78.145.73/3213.78.147.125/3213.78.148.75/3213.78.150.96/3213.78.150.134/3213.78.152.64/2813.78.164.187/32

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.