Apex domains cannot have CNAME records.
Question and response
Question
dig hejira.org. NS
Answer
hejira.org. 4 NS ns-319.awsdns-39.com.
hejira.org. 4 NS ns-1050.awsdns-03.org.
hejira.org. 4 NS ns-479.awsdns-59.com.
hejira.org. 4 NS ns-1898.awsdns-45.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0