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

Results forspfvar.rona.ca

Resolver

Location

TXT

Name	TTL	Value
spfvar.rona.ca	300	v=spf1 ip4:174.142.115.236 ip4:198.2.136.152 ip4:64.15.147.119 ip4:174.142.129.217 ip4:184.107.94.73 ip4:184.107.96.76 ip4:199.188.60.0/24 ip4:184.107.93.45 -all