Apex domains cannot have CNAME records.
Question and response
Question
dig infomir.com.ua. NS
Answer
infomir.com.ua. 5 NS ns2.infomir.com.ua.
infomir.com.ua. 5 NS ns1.infomir.com.ua.
Authority
The response has no authority records.
Additional
ns1.infomir.com.ua. 5 A 79.142.192.4
ns2.infomir.com.ua. 5 A 79.142.192.130
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0