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

Results for_spf.one.com

Resolver

Location

TXT

Name	TTL	Value
_spf.one.com	86400	v=spf1 ip4:195.47.247.0/24 ip4:193.202.110.0/24 ip4:46.30.208.0/21 ip4:104.37.32.0/21 ip4:185.164.12.0/22 ip4:185.10.8.0/22 ip4:5.249.232.0/24 ip6:2a02:2350:4:103::/64 ip6:2a02:2350:4:118::/64 ip6:2a02:2350:5:400::/56 ip6:2a02:2350:5:500::/56 ip6:2a02:235 0:4:121::/64 ip6:2a02:2350:4:122::/64 ip4:104.37.35.16/28 ip4:81.88.43.144/28 ~all