_spf.server072840.nazwa.pl has no NS records.
NS records for this zone are defined at server072840.nazwa.pl.
NS records for this zone are defined at server072840.nazwa.pl.
Question and response
Question
dig _spf.server072840.nazwa.pl. NS
Answer
The response has no answer records.
Authority
server072840.nazwa.pl. 3600 SOA ns1.nazwa.pl. biuro.nazwa.pl. 2008133202 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0