Apex domains cannot have CNAME records.
Question and response
Question
dig tiendaautogasglp.com. NS
Answer
tiendaautogasglp.com. 5 NS ns-656.awsdns-18.net.
tiendaautogasglp.com. 5 NS ns-1845.awsdns-38.co.uk.
tiendaautogasglp.com. 5 NS ns-603.awsdns-11.net.
tiendaautogasglp.com. 5 NS ns-967.awsdns-56.net.
Authority
The response has no authority records.
Additional
ns-967.awsdns-56.net. 2 A 205.251.195.199
ns-967.awsdns-56.net. 2 AAAA 2600:9000:5303:c700:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0