polmail04.polcard.com.pl has no NS records.
NS records for this zone are defined at polcard.com.pl.
NS records for this zone are defined at polcard.com.pl.
Question and response
Question
dig polmail04.polcard.com.pl. NS
Answer
The response has no answer records.
Authority
polcard.com.pl. 300 SOA dns2.p07.nsone.net. domainadmin.firstdata.com. 590215821 1200 180 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0