Apex domains cannot have CNAME records.
Question and response
Question
dig localiza.com.mx. NS
Answer
localiza.com.mx. 5 NS ns-719.awsdns-25.net.
localiza.com.mx. 5 NS ns-364.awsdns-45.com.
localiza.com.mx. 5 NS ns-1798.awsdns-32.co.uk.
localiza.com.mx. 5 NS ns-1268.awsdns-30.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0