smtp.nea.net.pl has no NS records.
NS records for this zone are defined at nea.net.pl.
NS records for this zone are defined at nea.net.pl.
Question and response
Question
dig smtp.nea.net.pl. NS
Answer
The response has no answer records.
Authority
nea.net.pl. 3600 SOA dns1.bestmedia.com.pl. admin.bestmedia.com.pl. 2020072400 10800 1800 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0