Apex domains cannot have CNAME records.
Question and response
Question
dig ducainband.com. NS
Answer
ducainband.com. 5 NS ns-818.awsdns-38.net.
ducainband.com. 5 NS ns-1252.awsdns-28.org.
ducainband.com. 5 NS ns-419.awsdns-52.com.
ducainband.com. 5 NS ns-1132.awsdns-13.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0