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

Results forstaging.softhouse.se

Domain Name	First seen	Still exists
cpanel.staging.softhouse.se	2021-10-02T22:38:31.000Z
cpcalendars.staging.softhouse.se	2021-10-02T22:38:31.000Z
cpcontacts.staging.softhouse.se	2021-10-02T22:38:31.000Z
mail.staging.softhouse.se	2021-10-02T22:38:31.000Z
webdisk.staging.softhouse.se	2021-10-02T22:38:31.000Z
webmail.staging.softhouse.se	2021-10-02T22:38:31.000Z
www.staging.softhouse.se	2021-10-02T22:38:31.000Z