dns3.jettel.pl has no NS records.
NS records for this zone are defined at jettel.pl.
NS records for this zone are defined at jettel.pl.
Question and response
Question
dig dns3.jettel.pl. NS
Answer
The response has no answer records.
Authority
jettel.pl. 3600 SOA ns2.tld.pl. admin.tld.pl. 2018110602 10800 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0