Apex domains cannot have CNAME records.
Question and response
Question
dig piszkenet.hu. NS
Answer
piszkenet.hu. 5 NS ns1.piszkenet.hu.
piszkenet.hu. 5 NS ns2.piszkenet.hu.
Authority
The response has no authority records.
Additional
ns1.piszkenet.hu. 5 A 80.211.104.96
ns2.piszkenet.hu. 5 A 79.120.237.254
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0