Apex domains cannot have CNAME records.
Question and response
Question
dig microcentrix.com. NS
Answer
microcentrix.com. 5 NS ns-1172.awsdns-18.org.
microcentrix.com. 5 NS ns-1108.awsdns-10.org.
microcentrix.com. 5 NS ns-1032.awsdns-01.org.
microcentrix.com. 5 NS ns-1198.awsdns-21.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0