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

Results forspf5.haulware.com

Resolver

Location

TXT

Name	TTL	Value
spf5.haulware.com	3600	v=spf1 ip4:20.80.44.135 ip4:20.80.44.199 ip4:20.80.44.175 ip4:20.80.42.99 ip4:20.80.44.176 ip4:20.80.44.233 ip4:172.183.144.15 ip4:20.80.45.1 ip4:20.80.44.215 -all