Apex domains cannot have CNAME records.
Question and response
Question
dig divinapastora.edu.do. NS
Answer
divinapastora.edu.do. 3 NS ns72.hostgator.mx.
divinapastora.edu.do. 3 NS ns73.hostgator.mx.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0