Apex domains cannot have CNAME records.
Question and response
Question
dig arthurholmansh.com. NS
Answer
arthurholmansh.com. 5 NS ns-1521.awsdns-62.org.
arthurholmansh.com. 5 NS ns-268.awsdns-33.com.
arthurholmansh.com. 5 NS ns-1479.awsdns-56.org.
arthurholmansh.com. 5 NS ns-1936.awsdns-50.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0