kronos.elkman.pl has no CNAME records.
Question and response
Question
dig kronos.elkman.pl. NS
Answer
The response has no answer records.
Authority
elkman.pl. 800 SOA ns1.elkman.pl. hostmaster.elkman.pl. 2025120501 2400 3600 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0