Apex domains cannot have CNAME records.
Question and response
Question
dig maxer.hu. NS
Answer
maxer.hu. 5 NS ns1.maxer.hu.
maxer.hu. 5 NS ns2.maxer.hu.
Authority
The response has no authority records.
Additional
ns1.maxer.hu. 5 A 87.229.26.158
ns2.maxer.hu. 5 A 87.229.73.146
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0