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

Results for_spf3.yahoo.com

Resolver

Location

TXT

Name	TTL	Value
_spf3.yahoo.com	1800	v=spf1 ip4:106.10.176.0/24 ip4:106.10.240.0/22 ip4:106.10.244.0/24 ip4:116.214.12.0/24 ip4:124.108.96.0/24 ip4:188.125.69.0/24 ip4:203.188.197.0/24 ip4:203.188.200.0/24 ip4:203.188.201.12/30 ip4:208.71.40.0/24 ip4:208.71.42.0/24 ip4:212.82.96.0/24 ip4:212 .82.98.0/24 ip4:216.39.60.0/23 ip4:216.39.62.0/24 ip4:216.109.114.0/24 ~all