What determines if an external hostname is a host or just a subdomain of a host

One is required to register external hosts accessed by an application on the Manage page. Are

api.hostname.com
api.subdomain.hostname.com

two different external hosts from the Backendless perspective? Does it matter if a DNS lookup returns two different IP addresses for these two URLs? Put another way, if one registers:

api.hostname.com

as an external host with Backendless, will one also be able to get to:

api.subdomain.hostname.com

without registering this latter host separately?

Thanks.

Hi Rick!

“…api.hostname.com, api.subdomain.hostname.com two different external hosts from the Backendless perspective?”
Backendless identifies them like two different external hosts. You should add two external hosts (api.hostname.com and api.subdomain.hostname.com) in your Backendless app.
Regards,
Kate.