ns2.domainmaker.pl has no CNAME records.
Question and response
Question
dig ns2.domainmaker.pl. NS
Answer
The response has no answer records.
Authority
domainmaker.pl. 2812 SOA ns1.domainmaker.pl. admin.domainmaker.pl. 2007075144 7200 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0