Apex domains cannot have CNAME records.
Question and response
Question
dig ebc.ee. NS
Answer
ebc.ee. 1 NS ns.eenet.ee.
ebc.ee. 1 NS ns1.ut.ee.
ebc.ee. 1 NS ns2.ut.ee.
ebc.ee. 1 NS ns2.eenet.ee.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0