poczta.optronet.pl has no NS records.
NS records for this zone are defined at optronet.pl.
NS records for this zone are defined at optronet.pl.
Question and response
Question
dig poczta.optronet.pl. NS
Answer
The response has no answer records.
Authority
optronet.pl. 1800 SOA adaline.ns.cloudflare.com. dns.cloudflare.com. 2397947077 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0