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

Results forspf.eu-west-stg.atmailcloud.com

Resolver

Location

A

Name	TTL	Value
spf.eu-west-stg.atmailcloud.com	1800	18.202.83.53AWS EC2 (eu-west-1) / Amazon Technologies Inc.
spf.eu-west-stg.atmailcloud.com	1800	52.212.64.46AWS EC2 (eu-west-1) / Amazon.com, Inc.
spf.eu-west-stg.atmailcloud.com	1800	54.73.175.3AWS EC2 (eu-west-1) / Amazon.com, Inc.
spf.eu-west-stg.atmailcloud.com	1800	54.76.143.39AWS EC2 (eu-west-1) / Amazon.com, Inc.
spf.eu-west-stg.atmailcloud.com	1800	54.220.243.107AWS EC2 (eu-west-1) / Amazon.com, Inc.
spf.eu-west-stg.atmailcloud.com	1800	54.246.40.111AWS EC2 (eu-west-1) / Amazon.com, Inc.