Moving apps services location and keeping the same IP Address

Question

Hi - we want to move 3 apps services from Western Europe to the UK - can we keep their IP address the same?

Answer 1

In short - no you cannot retain the same IP addresses when moving Azure App Services from one region to another, such as from Western Europe to the UK. IP addresses in Azure are region-specific, and App Services are assigned dynamic or static IPs within their deployment region. To maintain the same public-facing endpoints, you would need to use a custom domain with Azure Front Door, Traffic Manager, or an Application Gateway, which can route traffic to the new region without changing the DNS seen by clients.

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hth

Marcin

Answer 2

Hii @ptj_admin ,

Thank you reaching us regarding the issue to move your Azure app services from Western Europe to the UK, while trying to keep the same IP address. Unfortunately, App Service resources are region-specific and cannot be moved across regions directly while retaining their original IP addresses.
As suggested by community @Marcin Policht ,
Azure App Service resources cannot be moved to another region. You must recreate them in the new region (UK).

• When recreated, both inbound and outbound IPs will change.
• It is impossible to keep the same IP address across regions.

1.Inbound IP addresses change:
App Service’s inbound IP address is not permanently tied to the app. It is tied to the underlying deployment unit (App Service stamp). Because of this, certain operations can force your app onto a different deployment unit > causing a new inbound IP.

2.Outbound IP addresses also change when moving plans
Moving to a new App Service Plan is a change in outbound IP addresses because configuration referencing IPs must be updated (Private DNS, ACLs, routing rules, NSGs, firewall configurations).
Direct resource moves across regions aren't supported for App Services. Alternatives like using Azure Front Door or Traffic Manager can help abstract endpoint changes for clients, but the underlying App Service IPs themselves cannot be retained.

For the relocation process, Please follow the below recommends:

1. Back up the source app.
2. Create a new App Service plan and app in the target region.
3. Restore the backup to the new app.
4. Reconfigure settings, domains, and any IP-dependent elements.
5. Test and switch over traffic (e.g., update DNS).

Reference:
https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/relocation/relocation-app-service
https://learn.microsoft.com/en-us/azure/app-service/overview-inbound-outbound-ips?tabs=azure-portal
Kindly let us know if the above helps or you need further assistance on this issue.

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