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

Results forspf.subsys.no

Resolver

Location

TXT

Name	TTL	Value
spf.subsys.no	300	v=spf1 ip4:185.12.56.140 ip4:185.12.56.142 ip4:195.16.73.163 ip4:195.16.73.64 ip4:157.180.4.137 ip6:2a01:4f9:3071:208a::2 ip6:2a01:4f9:3100:2cd6::2 ip6:2a02:20c8:4230::2 ip6:2a02:20c8:4230::6 ip6:2a03:94e0:ffff:195:16:73:0:64 ip6:2a01:4f9:3100:2ae8::2