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

Results forcdn.questt.com

Resolver

Location

A

Name	TTL	Value
cdn.questt.com	60	3.170.3.13AWS CloudFront (GLOBAL) / Amazon.com, Inc.
cdn.questt.com	60	3.170.3.24AWS CloudFront (GLOBAL) / Amazon.com, Inc.
cdn.questt.com	60	3.170.3.29AWS CloudFront (GLOBAL) / Amazon.com, Inc.
cdn.questt.com	60	3.170.3.112AWS CloudFront (GLOBAL) / Amazon.com, Inc.