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

Results forapp.so.team

Resolver

Location

A

Name	TTL	Value
app.so.team	3600	151.101.1.195Fastly, Inc.
app.so.team	3600	151.101.65.195Fastly, Inc.

Name	TTL	Value
app.so.team	3600	10 mail0.mydevil.net

Name	TTL	Value
app.so.team	3600	dns1.mydevil.net
app.so.team	3600	dns2.mydevil.net

Name	TTL	Value
app.so.team	1200	dns1.mydevil.net admin.admin.net.pl 2018130006 10800 3600 604800 10800

Name	TTL	Value
app.so.team	3600	v=spf1 mx a include:mail0.mydevil.net -all