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

Results forspf.hosting.nl

Resolver

Location

TXT

Name	TTL	Value
spf.hosting.nl	3600	v=spf1 ip4:62.129.138.0/23 ip4:62.129.149.0/24 ip4:194.110.211.0/24 ip4:37.46.140.0/24 ip4:85.158.200.0/21 ip4:93.94.224.0/21 ip4:81.24.0.0/22 ip4:109.235.75.48/25 ip6:2a01:518:1:42:8::0/80 ~all