Apex domains cannot have CNAME records.
Question and response
Question
dig escuelavirtualmescyt.edu.do. NS
Answer
escuelavirtualmescyt.edu.do. 3 NS ns2-03.azure-dns.net.
escuelavirtualmescyt.edu.do. 3 NS ns3-03.azure-dns.org.
escuelavirtualmescyt.edu.do. 3 NS ns4-03.azure-dns.info.
escuelavirtualmescyt.edu.do. 3 NS ns1-03.azure-dns.com.
Authority
The response has no authority records.
Additional
ns1-03.azure-dns.com. 3 A 13.107.236.3
ns2-03.azure-dns.net. 3 A 150.171.21.3
ns1-03.azure-dns.com. 3 AAAA 2603:1061:0:700:0:0:0:3
ns2-03.azure-dns.net. 3 AAAA 2620:1ec:8ec:700:0:0:0:3
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0