ns2.praca-w-pracy.pl has no CNAME records.
Question and response
Question
dig ns2.praca-w-pracy.pl. NS
Answer
The response has no answer records.
Authority
praca-w-pracy.pl. 82 SOA ns1.praca-w-pracy.pl. hostmaster.praca-w-pracy.pl. 2026010200 2000 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0