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

Results forclick.mail.whynot.com

Resolver

Location

A

Name	TTL	Value
click.mail.whynot.com	60	18.165.83.15AWS CloudFront (GLOBAL) / Amazon.com, Inc.
click.mail.whynot.com	60	18.165.83.66AWS CloudFront (GLOBAL) / Amazon.com, Inc.
click.mail.whynot.com	60	18.165.83.83AWS CloudFront (GLOBAL) / Amazon.com, Inc.
click.mail.whynot.com	60	18.165.83.84AWS CloudFront (GLOBAL) / Amazon.com, Inc.