Apex domains cannot have CNAME records.
Question and response
Question
dig 86coffin.com. NS
Answer
86coffin.com. 5 NS ns-1291.awsdns-33.org.
86coffin.com. 5 NS ns-1325.awsdns-37.org.
86coffin.com. 5 NS ns-1786.awsdns-31.co.uk.
86coffin.com. 5 NS ns-1288.awsdns-33.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0