Apex domains cannot have CNAME records.
Question and response
Question
dig it.da.ut.ee. NS
Answer
it.da.ut.ee. 5 NS ns.ut.ee.
it.da.ut.ee. 5 NS ns2.ut.ee.
Authority
The response has no authority records.
Additional
ns.ut.ee. 5 A 193.40.5.99
ns2.ut.ee. 5 A 193.40.5.76
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0