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

Results for_netblock.netmark.pl

Resolver

Location

TXT

Name	TTL	Value
_netblock.netmark.pl	3600	v=spf1 ip4:212.91.26.110 ip4:91.185.187.181 ip4:31.186.82.227 ip4:128.204.218.254 ip4:213.189.55.38 ip4:77.79.227.128 ip4:91.185.187.159 ip4:212.91.26.126 ip4:185.36.169.3 ip4:85.194.246.12 ip4:128.204.218.51 ip4:128.204.218.36 ip4:128.204.218.188 ~all