Information about your application can be found at the top of the Manage Application page; this information includes the Application ID (which does not need to be kept secret), the application region, and the application’s Registration and Single Sign-On (SSO) domains:
In some cases, the wording for the Registration Domains might look like this:
documentation-1.janrain.com, and 3 more
The term and three more indicates that there are additional registration domains that couldn’t be displayed onscreen. If an application has more than one configured domain, you can display a list of all the domains by clicking the View all domains icon. When you do that, a dialog box appears listing all your registration and SSO domains.