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

Results for_netblock2.netmark.pl

Resolver

Location

TXT

Name	TTL	Value
_netblock2.netmark.pl	3600	v=spf1 ip4:77.79.227.185 ip4:31.186.82.217 ip4:77.79.227.180 ip4:31.186.82.161 ip4:91.185.190.109 ip4:91.185.189.252 ip4:85.194.241.206 ip4:185.36.169.201 ip4:91.185.185.200 ip4:128.204.218.234 ip4:185.36.171.17 ip4:91.185.184.231 ip4:31.186.83.100 ~all