Last Updated: 03 December 2014

europe regions

Table of Contents

Heroku is available in two geographic regions: the US and EU.

You can choose your app’s region to minimize latency for your end users—if your users are primarily in Europe your app will be faster for them if it’s running in Europe.

Select a region

Unless specified, all apps will be created in the us region. To specify a different region, use the --region flag when creating the app:

$ heroku create --region eu
Creating calm-ocean-1234... done, region is eu |
Git remote heroku added

Existing applications can be migrated to a new region.

To verify the app’s region, check the Region attribute of the heroku info command:

$ heroku info
=== calm-ocean-1234
Git URL:
Owner Email:
Region:        eu
Repo Size:     164M

List all available regions with:

$ heroku regions
=== regions
eu  Europe
us  United States


Add-ons with region support will be provisioned in the same region as the app. Provision them as you normally would:

$ heroku addons:add heroku-postgresql

Add-ons that don’t require a low-latency connection to your app will be provisioned in the default region if unavailable in your app’s region. If an add-on is latency sensitive and is not available in the same region as your app, provisioning will fail:

$ heroku addons:add cloudcounter
Adding cloudcounter on calm-ocean-1234... failed
!     This app is in region eu, cloudcounter:basic is only available in region us.

Supported add-ons

You can find add-ons supporting your app’s region using both the CLI and the web interface. To find add-ons supported in the eu region using the CLI, run this command:

$ heroku addons:list --region=eu

On you can use the search box to find add-ons that support the eu region by searching for “europe”. You can narrow your search further, for example to Redis add-ons that support the eu region by searching for “Redis europe”.


Apps are deployed to the region specified on creation. Deploy your app as usual.


One-off dynos are also run in the region where the app was created. This is also true of secondary services such as Heroku Scheduler that provision one-off dynos to execute jobs.

Custom domains

Adding custom domains to apps running outside the us region is the same as adding domains to apps in the us region. Add the following CNAME record in your DNS provider’s control panel (substituting example with the name of your Heroku app).

Type Name Target

This will route all traffic addressed to to

A-records are not supported on Heroku. If you wish to host an apex domain like “” on Heroku you must do so using an ALIAS or similar record from your DNS provider that allows for an apex domain to CNAME mapping.


To utilize SSL, provision an SSL Endpoint for your application and upload your SSL certs.

$ heroku addons:add ssl
Adding ssl on example... done, v1 ($20/mo)
Next add your certificate with `heroku certs:add PEM KEY`.
Use `heroku addons:docs ssl` to view documentation.

$ heroku certs:add server.crt server.key
Resolving trust chain... done
Adding SSL Endpoint to example... done
example now served by

If your custom domain is properly configured, no additional DNS configuration is required (this differs from the us region behavior, which requires using a domain like All traffic to can now be served over SSL.

Data center locations

Region Name Data Center Location
us amazon-web-services::us-east-1
eu amazon-web-services::eu-west-1

Data residency

Although each supported region represents a geographically isolated platform runtime, no assumptions should be made about the physical residency of your application data.

Consider the following cases where data is stored in a different location than your app:

  • Some non-latency sensitive add-ons can be provisioned in a different region as your app.
  • Application logs are routed to Logplex, currently hosted in the US.
  • PG Backup snapshots are stored in the US, and WAL files continuously sent to the US.
  • No guarantees are made about the physical location of Heroku’s control surface APIs through which all CLI commands and the management of your applications occur.

Migrating existing apps

Existing applications can migrate to a new region.