Apex domains cannot have CNAME records.
Question and response
Question
dig server1.bspconsults.com. NS
Answer
server1.bspconsults.com. 5 NS ns1.bspconsults.com.
server1.bspconsults.com. 5 NS ns2.bspconsults.com.
Authority
The response has no authority records.
Additional
ns1.bspconsults.com. 4 A 199.192.26.106
ns2.bspconsults.com. 4 A 199.192.26.106
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0