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

Results for_spf003.man.lodz.pl

Resolver

Location

TXT

Name	TTL	Value
_spf003.man.lodz.pl	600	v=spf1 ip4:212.191.2.9 ip6:2001:b10:0:9::9 ip4:212.191.2.10 ip6:2001:b10:0:9::10 ip4:212.191.2.15 ip6:2001:b10:0:9::15 ip4:212.191.2.0/24 ip4:212.51.192.0/24 ip6:2001:b10:0:9::5 -all