Apex domains cannot have CNAME records.
Question and response
Question
dig arthurfreesh.com. NS
Answer
arthurfreesh.com. 4 NS ns-278.awsdns-34.com.
arthurfreesh.com. 4 NS ns-1934.awsdns-49.co.uk.
arthurfreesh.com. 4 NS ns-956.awsdns-55.net.
arthurfreesh.com. 4 NS ns-890.awsdns-47.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0