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

Results forspf5.exacthosting.com

Resolver

Location

TXT

Name	TTL	Value
spf5.exacthosting.com	1200	v=spf1 ip4:69.167.166.96/27 ip4:69.167.184.0/24 ip4:72.52.241.0/24 ip4:74.116.88.0/22 ip4:95.216.98.211 ip4:96.30.0.0/16 ~all