Apex domains cannot have CNAME records.
Question and response
Question
dig uberlamb.com. NS
Answer
uberlamb.com. 5 NS ns-1160.awsdns-17.org.
uberlamb.com. 5 NS ns-1264.awsdns-30.org.
uberlamb.com. 5 NS ns-164.awsdns-20.com.
uberlamb.com. 5 NS ns-274.awsdns-34.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0