Apex domains cannot have CNAME records.
Question and response
Question
dig deultimominuto.net.do. NS
Answer
deultimominuto.net.do. 4 NS mallory.ns.cloudflare.com.
deultimominuto.net.do. 4 NS dakota.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0