smtp.poczta.ostnet.pl has no NS records.
NS records for this zone are defined at poczta.ostnet.pl.
NS records for this zone are defined at poczta.ostnet.pl.
Question and response
Question
dig smtp.poczta.ostnet.pl. NS
Answer
The response has no answer records.
Authority
poczta.ostnet.pl. 60 SOA dnsmaster.ostnet.pl. mgradzki.ost.net.pl. 2026021201 180 180 86244 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0