ns2.wad.pl has no CNAME records.
Question and response
Question
dig ns2.wad.pl. NS
Answer
The response has no answer records.
Authority
wad.pl. 2336 SOA ns1.wad.pl. admin.wad.pl. 2026021201 7200 540 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0