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

Results forspf.sarbacane.com

Resolver

Location

TXT

Name	TTL	Value
spf.sarbacane.com	3600	v=spf1 ip4:92.175.137.8/29 ip4:46.193.72.44 ip4:185.227.1.128/29 ip4:185.140.220.0/22 ip4:149.6.90.8/29 ip4:217.74.111.240/28 ip4:81.93.29.64/28 ip4:185.8.253.128/28 ip4:37.97.66.0/25 ip4:217.74.111.144/28 ip4:185.75.141.192/27 ip4:109.197.246.193/27 ip4:109.197.241.240/28 ip4:109.197.245.96/27 ip4:185.218.212.96/27 ~all