Apex domains cannot have CNAME records.
Question and response
Question
dig azrealtycentral.com. NS
Answer
azrealtycentral.com. 5 NS ns2.azrealtycentral.com.
azrealtycentral.com. 5 NS ns1.azrealtycentral.com.
Authority
The response has no authority records.
Additional
ns1.azrealtycentral.com. 5 A 74.208.95.245
ns2.azrealtycentral.com. 5 A 74.208.95.218
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0