Apex domains cannot have CNAME records.
Question and response
Question
dig allianz.hu. NS
Answer
allianz.hu. 5 NS dns1.allianz.hu.
allianz.hu. 5 NS ans1.telekom.hu.
Authority
The response has no authority records.
Additional
dns1.allianz.hu. 5 A 91.206.86.238
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0