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

Results forspf25.mailgrid.net.br

Resolver

Location

TXT

Name	TTL	Value
spf25.mailgrid.net.br	300	v=spf1 include:spf109.mailgrid.net.br ip4:142.44.148.164 ip4:198.27.89.10 ip4:51.79.35.106 ip4:54.39.39.44 ip4:66.70.175.248 ip4:198.27.89.147 ip4:198.27.89.26 ip4:51.79.116.58 ip4:54.39.39.45 ip4:51.79.116.57 ip4:54.39.164.159 ip4:54.39.164.168 -all