Apex domains cannot have CNAME records.
Question and response
Question
dig blras.com. NS
Answer
blras.com. 4 NS ns1.blras.com.
blras.com. 4 NS ns2.blras.com.
Authority
The response has no authority records.
Additional
ns1.blras.com. 4 A 107.158.144.74
ns2.blras.com. 4 A 104.206.11.123
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0