regoc.srce.hr has no CNAME records.
Question and response
Question
dig regoc.srce.hr. NS
Answer
The response has no answer records.
Authority
srce.hr. 753 SOA regoc.srce.hr. dns.srce.hr. 2026021901 1200 300 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0