Apex domains cannot have CNAME records.
Question and response
Question
dig getbase.com. NS
Answer
getbase.com. 4 NS ns-737.awsdns-28.net.
getbase.com. 4 NS ns-1717.awsdns-22.co.uk.
getbase.com. 4 NS ns-501.awsdns-62.com.
getbase.com. 4 NS ns-1034.awsdns-01.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0