Apex domains cannot have CNAME records.
Question and response
Question
dig servidordedicado.info. NS
Answer
servidordedicado.info. 4 NS so2.servidordedicado.info.
servidordedicado.info. 4 NS so1.servidordedicado.info.
servidordedicado.info. 4 NS hr1.servidordedicado.info.
servidordedicado.info. 4 NS os1.servidordedicado.info.
Authority
The response has no authority records.
Additional
hr1.servidordedicado.info. 4 A 177.53.140.123
os1.servidordedicado.info. 4 A 177.11.52.34
so1.servidordedicado.info. 4 A 177.53.141.200
so2.servidordedicado.info. 4 A 177.53.141.201
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0