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

Results forspf.vtx.ch

Resolver

Location

TXT

Name	TTL	Value
spf.vtx.ch	159	v=spf1 ip4:194.38.175.0/24 ip4:194.38.166.0/27 ip4:212.40.2.0/25 ip4:212.109.85.192/27 ip4:212.147.10.0/26 ip4:212.147.62.64/26 ip4:212.147.62.128/27 ip4:212.147.99.24/29 ip4:194.148.30.0/24 ip4:195.15.4.240/28 include:_spf-24x.romandie.hosting -all