# Hosted Instances know their own URL

> Hosted Instances now get an FF_INSTANCE_URL environment variable

Your hosted instance now knows its own URL. The `FF_INSTANCE_URL` [environment variable](/docs/user/envvar/#standard-environment-variables) is automatically available to your flows, so you can reference the instance's address without hardcoding it.

![List of Hosted Instance Environment Variables](/changelog/2026/04/images/ff-instance-url-env-var.png)*FF_INSTANCE_URL in list of Instance Environment Variables*

For Hosted Instances with a [Custom Hostname](/docs/user/custom-hostnames/#custom-hostnames) that will be returned rather than the default Instance hostname.

Existing instances will need to be restarted to pick up the new Environment Variable.

This will be available to Self Hosted users from v2.29.0