ns2.beep.pl has no CNAME records.
Question and response
Question
dig ns2.beep.pl. NS
Answer
The response has no answer records.
Authority
beep.pl. 2396 SOA ns1.beep.pl. bok.domena.pl. 2006268347 7200 1800 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0