Apex domains cannot have CNAME records.
Question and response
Question
dig infeedo.com. NS
Answer
infeedo.com. 3 NS ns-1297.awsdns-34.org.
infeedo.com. 3 NS ns-272.awsdns-34.com.
infeedo.com. 3 NS ns-786.awsdns-34.net.
infeedo.com. 3 NS ns-1802.awsdns-33.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0