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

Results forspf.danhost.dk

Resolver

Location

TXT

Name	TTL	Value
spf.danhost.dk	3600	v=spf1 ip4:195.178.15.12 ip4:185.20.207.114 ip4:195.178.14.20 ip4:185.20.207.115 ip4:185.20.207.115 ip4:185.20.207.27 ip4:185.20.207.25 include:spf.unoeuro.com ~all