Getting Started Subdomain

How it works (opens in a new tab) subdomains support local application development by always resolving to aka localhost. For example, while developing my-app on port 3000, you can access your server at: [ (opens in a new tab)]. No setup required.

X.509 Certificates via Anchor

When you create Anchor account, we automatically create:

  • A personal organization based on your GitHub login.
  • A localhost realm & CA ready to issue * subdomain certificates.

This makes setting up development services with subdomains quick and easy. For example, creating a my-app service will provision certificates.

DNS Records

The DNS records for all subdomains of will aways resolve to for A records and ::1 for AAAA records.