Apex domains cannot have CNAME records.
Question and response
Question
dig dovetailnow.com. NS
Answer
dovetailnow.com. 5 NS ns-1765.awsdns-28.co.uk.
dovetailnow.com. 5 NS ns-467.awsdns-58.com.
dovetailnow.com. 5 NS ns-596.awsdns-10.net.
dovetailnow.com. 5 NS ns-1363.awsdns-42.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0