poczta.lanet.net.pl has no NS records.
NS records for this zone are defined at lanet.net.pl.
NS records for this zone are defined at lanet.net.pl.
Question and response
Question
dig poczta.lanet.net.pl. NS
Answer
The response has no answer records.
Authority
lanet.net.pl. 1800 SOA kianchau.ns.cloudflare.com. dns.cloudflare.com. 2398711804 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0