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

Results forspf3.haulware.com

Resolver

Location

TXT

Name	TTL	Value
spf3.haulware.com	3600	v=spf1 ip4:20.80.45.84 ip4:20.80.45.90 ip4:20.80.45.108 ip4:20.80.45.88 ip4:20.80.45.198 ip4:20.80.45.81 ip4:20.80.45.208 ip4:20.80.45.160 ip4:20.80.45.202 ip4:20.80.45.233 ip4:20.80.45.30 ip4:52.162.107.29 -all