West US
Public cloudWest US is part of Azure public cloud, in California, United States. It has no availability zones listed. Its paired region is East US.
Explore West US
Latency
Published round-trip measurements from West US to 53 other regions.
VM prices
1,357 Linux and 1,284 Windows VM sizes with pay-as-you-go prices in USD. Compare hourly rates and pricing plans in West US.
Compare West US VM pricesIP ranges
431 IPv4 and 59 IPv6 prefixes in AzureCloud.westus. Inspect or download the regional AzureCloud ranges.
View West US IP rangesRegion facts
- Programmatic name
- westus
- Location
California, United States
View on Google Maps- Cloud
- Azure public cloud
- Availability zones
- No availability zones listed
- Paired region
- East US
- Approx. opening year
2012
Reported operational year for this location; individual Azure services can have different launch dates.
- Published residency note
Stored at rest in the United States
Microsoft's datacenter summary. Storage and replication behavior depend on the service and configuration.
Regional planning
Pairing and disaster recovery
West US and East US are paired in both directions.
Both regions are in the United States geography.
Published median round-trip latency from West US to East US: 67 ms.
A region pair does not automatically replicate your application or enable failover. Configure recovery for each service you use.
How Azure region pairing worksAccess and service availability
Eligibility: Available to all customers and partners
Available services, VM sizes, and quota still depend on the region and subscription.
Check products available by regionAvailability zone planning
West US: No availability zones listed. East US: 3 availability zones.
Zone support is not listed for West US. Check each service's redundancy options before designing for a datacenter outage.
Check service and zone supportLowest published latency from West US
The three lowest measured destinations in Microsoft's P50 (median) round-trip dataset. These are Azure backbone measurements; use the browser test for your own connection.
| Destination region | Median round-trip time |
|---|---|
| West US 3 | 19 ms |
| West US 2 | 25 ms |
| West Central US | 26 ms |