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

Results forcf1.emb666.com

Resolver

Location

TXT

Name	TTL	Value
cf1.emb666.com	600	v=spf1 ip4:173.245.48.0/20 ip4:103.21.244.0/22 ip4:103.22.200.0/22 ip4:103.31.4.0/22 ip4:141.101.64.0/18 ip4:108.162.192.0/18 ip4:190.93.240.0/20 ip4:188.114.96.0/20 ~all