Azure services with availability zone support

  • Article

Azure availability zones are physically separate locations within each Azure region. This article shows you which services support availability zones.

For more information on availability zones and regions, see What are Azure regions and availability zones?,

Azure is continually expanding the number of services that support availability zones, including zonal and zone-redundant offerings.

Types of availability zone support

Azure services can provide two types of availability zone support: zonal and zone-redundant. Each service might support one or both types. When designing your reliability strategy, make sure that you understand which availability zone types are supported in each service of your workload.

  • Zonal services: A resource can be deployed to a specific, self-selected availability zone to achieve more stringent latency or performance requirements. Resiliency is self-architected by replicating applications and data to one or more zones within the region. Resources are aligned to a selected zone. For example, virtual machines, managed disks, or standard IP addresses can be aligned to a same zone, which allows for increased resiliency by having multiple instances of resources deployed to different zones.

  • Zone-redundant services: Resources are replicated or distributed across zones automatically. For example, zone-redundant services replicate the data across multiple zones so that a failure in one zone doesn't affect the high availability of the data. 

Some services don't use availability zones until you configure them to do so. If you don't explicitly configure a service for availability zone support, it's called a non-zonal or regional deployment. Resources configured in this way might be placed in any availability zone in the region, and might be moved. If any availability zone in the region experiences an outage, non-zonal resources might be in the affected zone and could experience downtime.

Important

Some services may have limited support for availability zones. For example, some may only support availability zones for certain tiers, regions, or SKUs. To get more information on service limitations for availability zone support, select that service in the table.

Always-available services

Some Azure services don't support availability zones because they are:

  • Available across multiple Azure regions within a geographic area, or even across all Azure regions globally.
  • Resilient to zone-wide outages.
  • Resilient to region-wide outages.

For a complete list of always-available services, also called non-regional services, in Azure, see Products available by region.

For more information on older-generation virtual machines, see Previous generations of virtual machine sizes.

Azure services with availability zone support

The following tables provide a summary of the current offering of zonal, zone-redundant, and always-available Azure services. They list Azure offerings according to the regional availability of each.

Important

To learn more about availability zones support and available services in your region, contact your Azure sales or customer representative.

Legend

Legend containing icons and meaning of each with respect to regional availability of each service in the table.

In the Product Catalog, always-available services are listed as "non-regional" services.

Important

Some services, although they are zone-redundant, may have limited support for availability zones. For example, some may only support availability zones for certain tiers, regions, or SKUs. To get more information on service limitations for availability zone support, select that service in the following table.

AI and machine learning

Product Reliability
Azure AI Search An icon that signifies this service is zone redundant.
Azure Bot Services An icon that signifies this service is always available.

Analytics

Product Reliability
Azure Data Explorer An icon that signifies this service is zone redundant.
Azure Data Factory An icon that signifies this service is zone redundant.
Azure Event Hubs An icon that signifies this service is zone redundant.
Azure Storage: Azure Data Lake Storage An icon that signifies this service is zone redundant.
Azure Stream Analytics An icon that signifies this service is zone redundant.
Power BI Embedded An icon that signifies this service is zone redundant.

Compute

Product Reliability
Azure App Service An icon that signifies this service is zone redundant.
Azure App Service: App Service Environment An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Batch An icon that signifies this service is zone redundant.
Azure Container Apps An icon that signifies this service is zone redundant.
Azure Functions An icon that signifies this service is zone redundant.
Azure Kubernetes Service (AKS) An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Service Fabric An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Virtual Machine Scale Sets An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Virtual Machines An icon that signifies this service is zonal.
Azure Virtual Machines: Av2-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Bs-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Ddsv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Ddv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: DSv2-Series An icon that signifies this service is zonal.
Azure Virtual Machines: DSv3-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Dsv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Dv2-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Dv3-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Dv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Edsv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Edv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: ESv3-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Esv4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Ev3-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Ev4-Series An icon that signifies this service is zonal.
Azure Virtual Machines: F-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Fsv2-Series An icon that signifies this service is zonal.
Azure Virtual Machines: FS-Series An icon that signifies this service is zonal.
Azure Virtual Machines: M-Series An icon that signifies this service is zonal.
Azure Virtual Machines: Azure Compute Gallery An icon that signifies this service is zone redundant.
Azure Virtual Machines: Azure Dedicated Host An icon that signifies this service is zonal.
SQL Server on Azure Virtual Machines An icon that signifies this service is zone redundant.

*VMs that support availability zones: AV2-series, B-series, DSv2-series, DSv3-series, Dv2-series, Dv3-series, ESv3-series, Ev3-series, F-series, FS-series, FSv2-series, and M-series.*

Containers

Product Reliability
Azure App Configuration An icon that signifies this service is zone redundant.
Azure Container Apps An icon that signifies this service is zone redundant.
Azure Container Registry An icon that signifies this service is zone redundant.
Azure Functions An icon that signifies this service is zone redundant.
Azure Kubernetes Service (AKS) An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Service Fabric An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.

Databases

Product Reliability
Azure Cache for Redis An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Cosmos DB for NoSQL An icon that signifies this service is zone redundant.
Azure Data Factory An icon that signifies this service is zone redundant.
Azure Database for MySQL - Flexible Server An icon that signifies this service is zone redundant.
Azure Database for PostgreSQL - Flexible Server An icon that signifies this service is zone redundant.
Azure SQL Database An icon that signifies this service is zone redundant.
Azure SQL Managed Instance An icon that signifies this service is zone redundant.
SQL Server on Azure Virtual Machines An icon that signifies this service is zone redundant.

Developer tools

Product Reliability
Azure App Configuration An icon that signifies this service is zone redundant.
Azure Monitor An icon that signifies this service is zone redundant.
Azure Monitor: Application Insights An icon that signifies this service is zone redundant.

Hybrid and multicloud

Product Reliability
Azure Database for PostgreSQL - Flexible Server An icon that signifies this service is zone redundant.
Azure ExpressRoute An icon that signifies this service is zone redundant.
Azure SQL Database An icon that signifies this service is zone redundant.
Azure Stack Edge An icon that signifies this service is always available.
Microsoft Defender for Cloud An icon that signifies this service is always available.
Microsoft Sentinel An icon that signifies this service is always available.

Identity

Product Reliability
Microsoft Defender for Identity An icon that signifies this service is always available.
Microsoft Entra Domain Services An icon that signifies this service is zone redundant.
Microsoft Entra ID An icon that signifies this service is always available.

Integration

Product Reliability
Azure API Management An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Data Factory An icon that signifies this service is zone redundant.
Azure Event Grid An icon that signifies this service is zone-redundant
Azure Functions An icon that signifies this service is zone redundant.
Azure Logic Apps An icon that signifies this service is zone redundant.
Azure Service Bus An icon that signifies this service is zone redundant.
Azure Web PubSub An icon that signifies this service is zone redundant.

Internet of Things

Product Reliability
Azure API Management An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Cosmos DB for NoSQL An icon that signifies this service is zone redundant.
Azure Event Grid An icon that signifies this service is zone-redundant
Azure Functions An icon that signifies this service is zone redundant.
Azure IoT Hub An icon that signifies this service is zone redundant.
Azure IoT Hub Device Provisioning Service An icon that signifies this service is zone redundant.
Azure Logic Apps An icon that signifies this service is zone redundant.
Azure Stream Analytics An icon that signifies this service is zone redundant.

Management and governance

Product Reliability
Azure Advisor An icon that signifies this service is always available.
Azure Automation An icon that signifies this service is zone redundant.
Azure Backup An icon that signifies this service is zone redundant.
Azure Blueprints An icon that signifies this service is always available.
Azure Lighthouse An icon that signifies this service is always available.
Azure Managed Applications An icon that signifies this service is always available.
Azure Monitor An icon that signifies this service is zone redundant.
Azure Monitor: Application Insights An icon that signifies this service is zone redundant.
Azure Monitor: Log Analytics An icon that signifies this service is zone redundant.
Azure Network Watcher An icon that signifies this service is zone redundant.
Azure Policy An icon that signifies this service is always available.
Azure portal An icon that signifies this service is always available.
Azure Resource Graph An icon that signifies this service is always available.
Azure Site Recovery An icon that signifies this service is zonal
Azure Traffic Manager An icon that signifies this service is always available.
Azure Cost Management An icon that signifies this service is always available.
Microsoft Graph An icon that signifies this service is always available.

Media

Product Reliability
Azure Content Delivery Network An icon that signifies this service is always available.

Migration

Product Reliability
Azure Site Recovery An icon that signifies this service is zonal
Azure Cost Management An icon that signifies this service is always available.

Mobile

Product Reliability
Azure AI Search An icon that signifies this service is zone redundant.
Azure API Management An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure App Configuration An icon that signifies this service is zone redundant.
Azure App Service An icon that signifies this service is zone redundant.

Networking

Product Reliability
Azure Application Gateway (V2) An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Bastion An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Content Delivery Network An icon that signifies this service is always available.
Azure DNS An icon that signifies this service is always available.
Azure DNS: Azure DNS Private Zones An icon that signifies this service is zone redundant.
Azure DNS: Azure DNS Private Resolver An icon that signifies this service is zone redundant.
Azure ExpressRoute An icon that signifies this service is zone redundant.
Azure Firewall An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Firewall Manager An icon that signifies this service is zone redundant.
Azure Load Balancer An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure NAT Gateway An icon that signifies this service is zonal
Azure Network Watcher An icon that signifies this service is zone redundant.
Azure Network Watcher: Traffic Analytics An icon that signifies this service is zone redundant.
Azure Peering Service An icon that signifies this service is always available.
Azure Public IP An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Private Link An icon that signifies this service is zone redundant.
Azure Route Server An icon that signifies this service is zone redundant.
Azure Traffic Manager An icon that signifies this service is always available.
Azure Virtual Network An icon that signifies this service is zone redundant.
Azure Virtual WAN An icon that signifies this service is zone redundant.
Azure Virtual WAN: Azure ExpressRoute An icon that signifies this service is zone redundant.
Azure Virtual WAN: Point-to-site VPN Gateway An icon that signifies this service is zone redundant.
Azure Virtual WAN: Site-to-site VPN Gateway An icon that signifies this service is zone redundant.
Azure VPN Gateway An icon that signifies this service is zone redundant.

Security

Product Reliability
Azure Application Gateway (V2) An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Bastion An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Disk Encryption An icon that signifies this service is zone redundant.
Azure Firewall An icon that signifies this service is zone redundant. An icon that signifies this service is zonal.
Azure Firewall Manager An icon that signifies this service is zone redundant.
Azure Information Protection An icon that signifies this service is always available.
Azure Key Vault An icon that signifies this service is zone redundant.
Azure VPN Gateway An icon that signifies this service is zone redundant.
Microsoft Defender for Cloud An icon that signifies this service is always available.
Microsoft Defender for Identity An icon that signifies this service is always available.
Microsoft Defender for IoT An icon that signifies this service is always available.
Microsoft Entra Domain Services An icon that signifies this service is zone redundant.
Microsoft Sentinel An icon that signifies this service is always available.

Storage

Product Reliability
Azure Backup An icon that signifies this service is zone redundant.
Azure HPC Cache An icon that signifies this service is zonal.
Azure Storage account An icon that signifies this service is zone redundant.
Azure Storage: Azure Data Lake Storage An icon that signifies this service is zone redundant.
Azure Storage: Disk Storage An icon that signifies this service is zone redundant.
Azure Storage: Blob Storage An icon that signifies this service is zone redundant.
Azure Storage: Files Storage An icon that signifies this service is zone redundant.
Azure Storage: Managed Disks An icon that signifies this service is zone redundant. An icon that signifies this service is zonal

Web

Product Reliability
Azure AI Search An icon that signifies this service is zone redundant.
Azure API Management An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure App Configuration An icon that signifies this service is zone redundant.
Azure App Service An icon that signifies this service is zone redundant.
Azure App Service: App Service Environment An icon that signifies this service is zone redundant. An icon that signifies this service is zonal
Azure Container Apps An icon that signifies this service is zone redundant.
Azure Content Delivery Network An icon that signifies this service is always available.
Azure SignalR Service An icon that signifies this service is zone redundant.
Azure Web PubSub An icon that signifies this service is zone redundant.

Next steps