Atlas Azure Regions Mapping
Parent: MongoDB Atlas on Azure · Published reference · snapshot 2026-10-24 · skill mongodb-cohort-949f44190f7a
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Source-anchored research for Atlas Azure Regions Mapping. Run status: COMPLETED.
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How it works
- Microsoft warns that availability-zone support for a region does not guarantee support by every service. MongoDB states that Atlas automatically distributes dedicated cluster nodes across zones in supported regions and uses fault domains where zones are unavailable; clusters deployed before September 13, 2019 are not automatically redistributed when zones become available. (high confidence) (verified as of 2026-10-24) [source]
- Some Atlas-listed Azure regions may require Azure subscription access approval for private networking resources. Microsoft separately identifies restricted regions and documents a region access request process; an Atlas mapping is not proof that a subscription can create resources there. (high confidence) (verified as of 2026-10-24) [source]
How-to and procedures
- Use the region format documented for each operation: the Atlas cluster API uses Atlas Region values, whereas the Atlas CLI Azure private-endpoint creation example passes --region eastus. (high confidence) [source]
Problems, failure modes and limitations
- Atlas cluster configuration uses Atlas region identifiers alongside providerName=AZURE; Azure location strings cannot simply be substituted into these fields. (high confidence) [source]
Comparisons and alternatives
- Dedicated Search Node coverage differs from general Atlas cluster coverage: MongoDB lists US_WEST, US_WEST_CENTRAL, CANADA_EAST, UK_WEST and other Azure regions as unsupported for Search Nodes, and identifies ITALY_NORTH as available for low-CPU Search Nodes only. (low confidence) (verified as of 2026-10-24) [source]
Facts and statements
- For clusters, Azure eastus maps to US_EAST, while eastus2 maps to US_EAST_2; both Azure locations are in Virginia. (high confidence) [source]
- The cluster table maps centralus to US_CENTRAL, westus to US_WEST, westus2 to US_WEST_2, and westus3 to US_WEST_3. (low confidence) (verified as of 2026-10-14) [source]
- Online Archive Azure private-endpoint instructions list eastus2/US_EAST_2, brazilsouth/BRAZIL_SOUTH, and westeurope/EUROPE_WEST. (low confidence) (verified as of 2026-10-14) [source]
- MongoDB states that every region in its supported-region table supports dedicated M10+ clusters, while Free and Flex clusters are supported only in some regions. A valid region mapping therefore does not establish availability for every cluster tier. (low confidence) (verified as of 2026-10-24) [source]
- Some higher-cost secondary DR regions require Azure subscription approval before private networking resources can be created there. (medium confidence) (verified as of 2026-10-14) [source]
- A supported Atlas Azure region can temporarily lack instance capacity; documented remedies include another region, a larger tier, or waiting. (low confidence) (verified as of 2026-10-14) [source]
- Microsoft documents Azure programmatic names and provides az account list-locations, Get-AzLocation, and the Resource Manager REST API as ways to retrieve them. These enumerate Azure regions; Atlas support must be checked against MongoDB's separate supported-region table. (high confidence) [source]
- Atlas cluster configuration uses Atlas region identifiers. For Azure East US, the native name eastus maps to US_EAST; Pulumi demonstrates providerName="AZURE" with regionsConfigs[].regionName="US_EAST". (high confidence) [source]
- Representative Americas mappings are centralus → US_CENTRAL, eastus2 → US_EAST_2, westus2 → US_WEST_2, westus3 → US_WEST_3, canadacentral → CANADA_CENTRAL, brazilsouth → BRAZIL_SOUTH, chilecentral → CHILE_CENTRAL, and mexicocentral → MEXICO_CENTRAL. (low confidence) [source]
- Representative Europe mappings are northeurope → EUROPE_NORTH, westeurope → EUROPE_WEST, uksouth → UK_SOUTH, germanywestcentral → GERMANY_WEST_CENTRAL, polandcentral → POLAND_CENTRAL, and spaincentral → SPAIN_CENTRAL. (low confidence) [source]
- Representative Asia-Pacific, Africa and Middle East mappings are eastasia → ASIA_EAST, southeastasia → ASIA_SOUTH_EAST, centralindia → INDIA_CENTRAL, australiaeast → AUSTRALIA_EAST, japaneast → JAPAN_EAST, southafricanorth → SOUTH_AFRICA_NORTH, and uaenorth → UAE_NORTH. (low confidence) [source]
Children
- No children recorded.