Apex domains cannot have CNAME records.
Question and response
Question
dig bambroadband.net. NS
Answer
bambroadband.net. 5 NS ns2.as20303.net.
bambroadband.net. 5 NS ns1.as20303.net.
Authority
The response has no authority records.
Additional
ns1.as20303.net. 5 A 204.57.17.50
ns2.as20303.net. 5 A 204.57.17.51
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0