Apex domains cannot have CNAME records.
Question and response
Question
dig earthbornoil.com. NS
Answer
earthbornoil.com. 5 NS ns-617.awsdns-13.net.
earthbornoil.com. 5 NS ns-1651.awsdns-14.co.uk.
earthbornoil.com. 5 NS ns-397.awsdns-49.com.
earthbornoil.com. 5 NS ns-720.awsdns-26.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0