Apex domains cannot have CNAME records.
Question and response
Question
dig sespas.gov.do. NS
Answer
sespas.gov.do. 5 NS ns1.sespas.gov.do.
sespas.gov.do. 5 NS salpubwweb-001.msp.gob.do.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0