wask.wask.wroc.pl has no CNAME records.
Question and response
Question
dig wask.wask.wroc.pl. NS
Answer
The response has no answer records.
Authority
wask.wroc.pl. 3600 SOA wask.wask.wroc.pl. admin.wask.wroc.pl. 2025121101 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0