Apex domains cannot have CNAME records.
Question and response
Question
dig membrama.com. NS
Answer
membrama.com. 5 NS ns12.rehost.com.ua.
membrama.com. 5 NS ns11.rehost.com.ua.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0