dns1.hti.pl has no NS records.
NS records for this zone are defined at hti.pl.
NS records for this zone are defined at hti.pl.
Question and response
Question
dig dns1.hti.pl. NS
Answer
The response has no answer records.
Authority
hti.pl. 3600 SOA dns1.hti.pl. hostmaster.hti.pl. 2019082723 86400 7200 3600000 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0