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

Results for_spfcf1.nfserver.com

Resolver

Location

TXT

Name	TTL	Value
_spfcf1.nfserver.com	300	v=spf1 ip4:104.30.0.0/19 ip6:2405:8100:c000::/38 ip4:46.232.183.0/24 ip4:23.83.208.0/20 ip4:177.153.0.128/25 ip4:191.252.57.0/25 ip4:23.253.182.103 ip4:23.253.183.145 ip4:23.253.183.146 ip4:23.253.183.147 ip4:23.253.183.148 ip4:23.253.183.150 -all