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

Results forspf4.casefox.com

Resolver

Location

TXT

Name	TTL	Value
spf4.casefox.com	600	v=spf1 ip4:103.117.158.0/24 ip4:103.89.74.0/24 ip4:169.148.146.0/23 ip4:169.148.134.0/24 ip4:84.237.210.0/24 ip4:87.110.222.0/24 ip4:87.246.182.0/24 ip4:87.246.187.0/24 ip4:195.122.27.0/24 ip4:162.211.121.192/27 include:spf5.casefox.com ~all