Apex domains cannot have CNAME records.
Question and response
Question
dig scdias.x10.mx. NS
Answer
scdias.x10.mx. 5 NS ns2.x10hosting.com.
scdias.x10.mx. 5 NS ns1.x10hosting.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0