mx.nask.net.pl has no NS records.
NS records for this zone are defined at nask.net.pl.
NS records for this zone are defined at nask.net.pl.
Question and response
Question
dig mx.nask.net.pl. NS
Answer
The response has no answer records.
Authority
nask.net.pl. 3600 SOA ns.nask.org.pl. dns.nask.pl. 2025122900 28800 3600 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0