mx.grupazpr.pl has no NS records.
NS records for this zone are defined at grupazpr.pl.
NS records for this zone are defined at grupazpr.pl.
Question and response
Question
dig mx.grupazpr.pl. NS
Answer
The response has no answer records.
Authority
grupazpr.pl. 1800 SOA alina.ns.cloudflare.com. dns.cloudflare.com. 2397340465 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0