Custom Domain Names for Apps | Heroku Dev CenterBy default, a Heroku app is available at its Heroku domain, which has the form APPNAME-IDENTIFIER.herokuapp.com. For example, an app named example-app is hosted at example-app-1234567890ab.herokuapp.com. While your app is available at your subdomain, we strongly recommend adding a custom domain to production apps. Heroku started appending identifiers to subdomains on June 14, 2023. Applications cr
