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

Results formailbox.dps.io

Resolver

Location

A

Name	TTL	Value
mailbox.dps.io	60	3.171.85.13AWS CloudFront (GLOBAL) / Amazon.com, Inc.
mailbox.dps.io	60	3.171.85.57AWS CloudFront (GLOBAL) / Amazon.com, Inc.
mailbox.dps.io	60	3.171.85.64AWS CloudFront (GLOBAL) / Amazon.com, Inc.
mailbox.dps.io	60	3.171.85.122AWS CloudFront (GLOBAL) / Amazon.com, Inc.