Apex domains cannot have CNAME records.
Question and response
Question
dig tourfortsmith.com. NS
Answer
tourfortsmith.com. 5 NS ns-1917.awsdns-47.co.uk.
tourfortsmith.com. 5 NS ns-1980.awsdns-55.co.uk.
tourfortsmith.com. 5 NS ns-61.awsdns-07.com.
tourfortsmith.com. 5 NS ns-419.awsdns-52.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0