Apex domains cannot have CNAME records.
Question and response
Question
dig tecage.edu.do. NS
Answer
tecage.edu.do. 4 NS ns1.orbit.globalhost1.com.
tecage.edu.do. 4 NS ns2.orbit.globalhost1.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0