Apex domains cannot have CNAME records.
Question and response
Question
dig bisonrow.com. NS
Answer
bisonrow.com. 5 NS ns2.bisonrow.com.
bisonrow.com. 5 NS ns1.bisonrow.com.
Authority
The response has no authority records.
Additional
ns1.bisonrow.com. 5 A 51.91.165.225
ns2.bisonrow.com. 5 A 45.142.105.77
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0