Apex domains cannot have CNAME records.
Question and response
Question
dig panorama.com.mx. NS
Answer
panorama.com.mx. 5 NS ns.panorama.com.mx.
Authority
The response has no authority records.
Additional
ns.panorama.com.mx. 5 A 201.151.197.163
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0