Apex domains cannot have CNAME records.
Question and response
Question
dig estudiosoledadanda.com.ec. NS
Answer
estudiosoledadanda.com.ec. 4 NS srv1.telconet.net.
estudiosoledadanda.com.ec. 4 NS srv2.telconet.net.
Authority
The response has no authority records.
Additional
srv1.TELCONET.NET. 2 A 200.93.192.148
srv2.TELCONET.NET. 2 A 200.93.192.161
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0