Apex domains cannot have CNAME records.
Question and response
Question
dig uudanbury-dev.org. NS
Answer
uudanbury-dev.org. 5 NS ns-48.awsdns-06.com.
uudanbury-dev.org. 5 NS ns-1474.awsdns-56.org.
uudanbury-dev.org. 5 NS ns-1288.awsdns-33.org.
uudanbury-dev.org. 5 NS ns-1171.awsdns-18.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0