Apex domains cannot have CNAME records.
Question and response
Question
dig bladeboardcenter.com. NS
Answer
bladeboardcenter.com. 5 NS ns1.bladeboardcenter.com.
bladeboardcenter.com. 5 NS ns2.bladeboardcenter.com.
Authority
The response has no authority records.
Additional
ns1.bladeboardcenter.com. 5 A 173.44.158.47
ns2.bladeboardcenter.com. 5 A 67.222.150.32
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0