dns2.tld.pl has no CNAME records.
Question and response
Question
dig dns2.tld.pl. NS
Answer
The response has no answer records.
Authority
tld.pl. 2387 SOA ns1.tld.pl. admin.tld.pl. 2026030317 10800 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0