ns2.hostido.net.pl has no CNAME records.
Question and response
Question
dig ns2.hostido.net.pl. NS
Answer
The response has no answer records.
Authority
hostido.net.pl. 2019 SOA ns1.hostido.net.pl. admin.hostido.pl. 183 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0