Apex domains cannot have CNAME records.
Question and response
Question
dig foireokdo.com. NS
Answer
foireokdo.com. 5 NS ns-1095.awsdns-08.org.
foireokdo.com. 5 NS ns-1534.awsdns-63.org.
foireokdo.com. 5 NS ns-410.awsdns-51.com.
foireokdo.com. 5 NS ns-688.awsdns-22.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0