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

Results for_spf1.yahoo.com

Resolver

Location

TXT

Name	TTL	Value
_spf1.yahoo.com	1800	v=spf1 ip4:27.123.206.0/24 ip4:46.228.39.0/24 ip4:66.163.184.0/21 ip4:66.196.81.0/24 ip4:67.195.22.0/24 ip4:67.195.60.0/24 ip4:67.195.87.0/24 ip4:68.142.230.0/24 ip4:72.30.234.152/29 ip4:72.30.238.0/23 ip4:74.6.128.0/21 ip4:77.238.176.0/22 ip4:87.248.110. 0/24 ip4:98.136.164.0/24 ip4:98.136.185.0/24 ip4:98.136.217.0/24 ip4:98.136.218.0/24 ip4:98.137.12.0/24 ip4:98.137.64.0/21 ~all