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

Results forspf.securence.com

Resolver

Location

TXT

Name	TTL	Value
spf.securence.com	300	v=spf1 ip4:216.17.3.0/24 ip4:216.17.6.0/23 ip4:216.17.12.0/24 ip4:216.17.14.0/24 ip4:216.17.20.0/24 ip4:216.17.24.0/24 ip4:216.17.54.0/24 ip4:216.17.56.0/24 ip4:216.17.62.0/23 ip4:50.93.244.0/23 ip4:50.93.240.0/22 ip6:2605:8400:1:24::/64 -all