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

Results forspf4.haulware.com

Resolver

Location

TXT

Name	TTL	Value
spf4.haulware.com	3600	v=spf1 ip4:20.80.45.2 ip4:20.80.42.9 ip4:20.80.42.17 ip4:20.80.40.251 ip4:20.80.42.10 ip4:20.80.45.20 ip4:20.80.40.216 ip4:20.80.41.85 ip4:20.80.45.63 ip4:20.80.40.239 ip4:20.80.41.23 -all