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

Results forspf.digifactory.fr

Resolver

Location

TXT

Name	TTL	Value
spf.digifactory.fr	1200	v=spf1 ip4:217.182.175.195 ip4:51.91.66.126 ip4:178.33.231.171 ip4:91.134.34.70 ip6:2001:41d0:203:cc3::1 ip6:2001:41d0:203:cc3:: ip6:2001:41d0:303:c37e:: ip6:2001:41d0:303:c37e::1 ip6:2001:41d0:8:28ab:: ip6:2001:41d0:8:28ab::1 -all