Apex domains cannot have CNAME records.
Question and response
Question
dig arthurfogelsh.com. NS
Answer
arthurfogelsh.com. 5 NS ns-915.awsdns-50.net.
arthurfogelsh.com. 5 NS ns-715.awsdns-25.net.
arthurfogelsh.com. 5 NS ns-542.awsdns-03.net.
arthurfogelsh.com. 5 NS ns-1982.awsdns-55.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0