Apex domains cannot have CNAME records.
Question and response
Question
dig brownstonesquare.com. NS
Answer
brownstonesquare.com. 2 NS ns-337.awsdns-42.com.
brownstonesquare.com. 2 NS ns-664.awsdns-19.net.
brownstonesquare.com. 2 NS ns-417.awsdns-52.com.
brownstonesquare.com. 2 NS ns-1761.awsdns-28.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0