Apex domains cannot have CNAME records.
Question and response
Question
dig shbetlll.com. NS
Answer
shbetlll.com. 5 NS ns-1208.awsdns-23.org.
shbetlll.com. 5 NS ns-211.awsdns-26.com.
shbetlll.com. 5 NS ns-624.awsdns-14.net.
shbetlll.com. 5 NS ns-1569.awsdns-04.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0