mrf.host.nask.pl has no NS records.
NS records for this zone are defined at host.nask.pl.
NS records for this zone are defined at host.nask.pl.
Question and response
Question
dig mrf.host.nask.pl. NS
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0