Apex domains cannot have CNAME records.
Question and response
Question
dig ikibiki.org. NS
Answer
ikibiki.org. 5 NS ns-189.awsdns-23.com.
ikibiki.org. 5 NS ns-1522.awsdns-62.org.
ikibiki.org. 5 NS ns-89.awsdns-11.com.
ikibiki.org. 5 NS ns-773.awsdns-32.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0