# Default domain

Source: https://docs.fortrabbit.com/platform/domains/default-domain
Published: 2026-04-03
Updated: 2026-10-21
Reviewed: 2026-10-21

> Every environment gets a frbit.app default domain that works immediately, with TLS and without any DNS configuration.


## Structure

Default domains follow a predictable naming pattern: `{environment}.{region}.frbit.app`, where environment is the unique app environment identifier, region indicates the data center location, and frbit.app is the fortrabbit root domain.



```raw
{{ environment }}.{{ region }}.frbit.app

environment — ID, short unique identifier
region — data center region ID, geo location
frbit.app — fortrabbit associated root domain
```

- Example: `https://en-34fdsa.eu-w1a.frbit.app`
- [Live code](/platform/concepts/live-code-examples) example: `{{app-env-id}}.{{region}}.frbit.app` (login required)
- TLS is included. The default domain is always served over HTTPS.

## Use cases

- **Test** — open the environment in a browser after deploy without any setup.
- **Share work in progress** — send the default domain to a colleague or client.
- **Staging environments** — use the default domain for feature development preview.
- **CI/CD pipelines** — reference the default domain in automated tests or health checks.

## Limits

- **The name can not be changed.** The environment ID part of the default domain is fixed at environment creation time.
- The default domain can not be deleted.
- The default domain is not a replacement for a production domain. For a customer-facing address, add an [external domain](/platform/domains/external-domains).

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- [Domain intro](/platform/objects/domain)
- [Domain providers integration](/integrations/dns/intro)