Apex domains cannot have CNAME records.
Question and response
Question
dig flutrigger.biz. NS
Answer
flutrigger.biz. 5 NS ns1.flutrigger.biz.
flutrigger.biz. 5 NS ns2.flutrigger.biz.
Authority
The response has no authority records.
Additional
ns1.flutrigger.biz. 5 A 69.39.239.200
ns2.flutrigger.biz. 5 A 69.65.38.184
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0