Apex domains cannot have CNAME records.
Question and response
Question
dig bloombb.net. NS
Answer
bloombb.net. 1 NS dns02.bloombb.net.
bloombb.net. 1 NS dns01.bloombb.net.
Authority
The response has no authority records.
Additional
dns01.bloombb.net. 1 A 173.46.255.200
dns02.bloombb.net. 1 A 173.46.244.4
dns01.bloombb.net. 1 AAAA 2606:5e80:0:0:0:0:0:2
dns02.bloombb.net. 1 AAAA 2606:5e80:300:0:0:0:0:3
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0