mx1.risp.pl has no NS records.
NS records for this zone are defined at risp.pl.
NS records for this zone are defined at risp.pl.
Question and response
Question
dig mx1.risp.pl. NS
Answer
The response has no answer records.
Authority
risp.pl. 3600 SOA ns1.q3.pl. admin.q3.pl. 2020122800 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0