Apex domains cannot have CNAME records.
Question and response
Question
dig howtospell24.com. NS
Answer
howtospell24.com. 5 NS ns-764.awsdns-31.net.
howtospell24.com. 5 NS ns-1778.awsdns-30.co.uk.
howtospell24.com. 5 NS ns-967.awsdns-56.net.
howtospell24.com. 5 NS ns-784.awsdns-34.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0