It can be anything! An apex, subdomain, or even a URL.

Results forcdn.one8.app

Resolver

Location

A

Name	TTL	Value
cdn.one8.app	60	3.170.3.37AWS CloudFront (GLOBAL) / Amazon.com, Inc.
cdn.one8.app	60	3.170.3.42AWS CloudFront (GLOBAL) / Amazon.com, Inc.
cdn.one8.app	60	3.170.3.79AWS CloudFront (GLOBAL) / Amazon.com, Inc.
cdn.one8.app	60	3.170.3.124AWS CloudFront (GLOBAL) / Amazon.com, Inc.