Apex domains cannot have CNAME records.
Question and response
Question
dig saip.gov.do. NS
Answer
saip.gov.do. 5 NS peaches.ns.cloudflare.com.
saip.gov.do. 5 NS jaime.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0