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

Results forspf.cmdwebsites.com

Resolver

Location

TXT

Name	TTL	Value
spf.cmdwebsites.com	3600	v=spf1 ip4:54.146.244.161 ip4:3.220.15.26 ip4:50.17.43.190 ip4:162.242.209.113 ip4:184.73.33.12 include:amazonses.com include:secureserver.net ~all