Apex domains cannot have CNAME records.
Question and response
Question
dig consa.edu.do. NS
Answer
consa.edu.do. 4 NS ns80.dnns.net.
consa.edu.do. 4 NS ns81.dnns.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0