Apex domains cannot have CNAME records.
Question and response
Question
dig balanceadordhweb02n.dinaserver.com. NS
Answer
balanceadordhweb02n.dinaserver.com. 5 NS ns2.gestiondecuenta.com.
balanceadordhweb02n.dinaserver.com. 5 NS ns3.gestiondecuenta.com.
balanceadordhweb02n.dinaserver.com. 5 NS ns4.gestiondecuenta.com.
balanceadordhweb02n.dinaserver.com. 5 NS ns.gestiondecuenta.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0