defect.ict.pwr.wroc.pl has no CNAME records.
Question and response
Question
dig defect.ict.pwr.wroc.pl. NS
Answer
The response has no answer records.
Authority
ict.pwr.wroc.pl. 3319 SOA hugin.ict.pwr.wroc.pl. tsurmacz.ict.pwr.wroc.pl. 202601190 43200 7200 2678400 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0