Apex domains cannot have CNAME records.
Question and response
Question
dig wind.net.do. NS
Answer
wind.net.do. 5 NS ns3.wind.com.do.
wind.net.do. 5 NS ns4.wind.com.do.
wind.net.do. 5 NS ns1.wind.com.do.
wind.net.do. 5 NS ns2.wind.com.do.
Authority
The response has no authority records.
Additional
ns1.WIND.COM.DO. 5 A 190.122.97.20
ns2.wind.com.do. 5 A 200.26.170.67
ns3.WIND.COM.DO. 5 A 190.122.117.10
ns4.WIND.COM.DO. 5 A 200.26.170.15
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0