# Zones

[](/en/operations/zones.html.md "View as Markdown") 

An application instance can be deployed to one or more _zones_. A zone in this documentation refers to a Vespa zone, the basic target location for the deployment of an application instance. A zone is identified by an [environment](environments.html) and a _region_ identifier, for example `prod.aws-us-east-1c`. This zone can be found in the below list of zones in Vespa Cloud.

A zone supports one or more availability zones. The `prod.aws-us-east-1c` zone is in the AWS availability zone with AZ ID `use1-az6`. Zones in Azure and GCP support the availability zone given by the region identifier, for example `prod.gcp-europe-west3-b` is in the GCP availability zone europe-west3-b. You can read more about zones supporting more than one availability zone in [regional zones](az.html).

If an application requires zone-specific configuration (e.g., different capacity requirements per zone), use [environment and region variants](deployment-variants.html#services.xml-variants). Also see [deployment.xml](../reference/applications/deployment.html).

`dev` zones for development and performance testing:

| Environment | Default | Region | Availability Zones |
| --- | --- | --- | --- |
| [dev](environments.html#dev) | Yes | aws-us-east-1c | use1-az6 |
| [dev](environments.html#dev) | No | aws-euw1-az1 | euw1-az1 |
| [dev](environments.html#dev) | No | azure-eastus-az1 | |
| [dev](environments.html#dev) | No | gcp-us-central1-a | |
| [dev](environments.html#dev) | No | gcp-us-central1-f | |

`prod` zones for production serving, with a [CD pipeline](automated-deployments.html):

| Environment | Region | Availability Zones |
| --- | --- | --- |
| [prod](environments.html#prod) | aws-us-east-1 | use1-az1 to use1-az6, except use1-az3 |
| [prod](environments.html#prod) | aws-us-east-1c | use1-az6 |
| [prod](environments.html#prod) | aws-use1-az4 | use1-az4 |
| [prod](environments.html#prod) | aws-use2-az1 | use2-az1 |
| [prod](environments.html#prod) | aws-use2-az3 | use2-az3 |
| [prod](environments.html#prod) | aws-us-west-2a | usw2-az1 |
| [prod](environments.html#prod) | aws-usw2-az2 | usw2-az2 |
| [prod](environments.html#prod) | aws-usw2-az3 | usw2-az3 |
| [prod](environments.html#prod) | aws-eu-west-1 | euw1-az1 to euw1-az3 |
| [prod](environments.html#prod) | aws-eu-west-1a | euw1-az2 |
| [prod](environments.html#prod) | aws-euw1-az1 | euw1-az1 |
| [prod](environments.html#prod) | aws-euw1-az3 | euw1-az3 |
| [prod](environments.html#prod) | aws-euc1-az1 | euc1-az1 |
| [prod](environments.html#prod) | aws-euc1-az2 | euc1-az2 |
| [prod](environments.html#prod) | aws-euc1-az3 | euc1-az3 |
| [prod](environments.html#prod) | aws-eun1-az1 | eun1-az1 |
| [prod](environments.html#prod) | aws-cac1-az1 | cac1-az1 |
| [prod](environments.html#prod) | aws-cac1-az2 | cac1-az2 |
| [prod](environments.html#prod) | aws-cac1-az4 | cac1-az4 |
| [prod](environments.html#prod) | aws-aps1-az1 | aps1-az1 |
| [prod](environments.html#prod) | aws-ap-northeast-1a | apne1-az4 |
| [prod](environments.html#prod) | aws-apne1-az1 | apne1-az1 |
| [prod](environments.html#prod) | aws-apne1-az2 | apne1-az2 |
| [prod](environments.html#prod) | gcp-europe-west3-b | |
| [prod](environments.html#prod) | gcp-us-central1-a | |
| [prod](environments.html#prod) | gcp-us-central1-b | |
| [prod](environments.html#prod) | gcp-us-central1-c | |
| [prod](environments.html#prod) | gcp-us-central1-f | |
| [prod](environments.html#prod) | gcp-us-east4-c | |
| [prod](environments.html#prod) | gcp-us-west1-c | |

The `prod` zones use ephemeral instances for system tests and staging tests, running in [test](environments.html#test) and [staging](environments.html#staging) environments. These are internal zones, and never directly deployed to, included here for reference:

| Environment | Region | Availability Zones |
| --- | --- | --- |
| [test](environments.html#test) | aws-us-east-1c | use1-az6 |
| [test](environments.html#test) | gcp-us-central1-f | |
| [staging](environments.html#staging) | aws-us-east-1c | use1-az6 |
| [staging](environments.html#staging) | gcp-us-central1-f | |

Contact [Support](https://vespa.ai/support/) to request more zones.

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