ns3.dnsx2.pl has no NS records.
NS records for this zone are defined at dnsx2.pl.
NS records for this zone are defined at dnsx2.pl.
Question and response
Question
dig ns3.dnsx2.pl. NS
Answer
The response has no answer records.
Authority
dnsx2.pl. 300 SOA ns1.dnsx2.pl. noc.leniwiec.biz. 2015010107 1200 300 604800 300
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0