Cloud region · AZURE · North America MON · 14 SEP 2026

West US 3

Region code westus3 · Operator AZURE · Phoenix, United States · Launched 2021

About this region

West US 3 is a cloud region operated by AZURE in Phoenix, United States. It is the region you select when you want compute, storage and managed services served from infrastructure physically located in or near Phoenix.

The region comprises 3 Availability Zones, each a separate physical facility with independent power, cooling and network paths. Workloads distributed across multiple AZs in the same region survive single-facility failures with millisecond-scale failover latency.

The region has been operational since 2021 (5 years).

Other cloud regions in Phoenix

If you need multi-cloud workloads in Phoenix, the providers listed below also operate a region here.