Apex domains cannot have CNAME records.
Question and response
Question
dig asnic.biz. NS
Answer
asnic.biz. 5 NS ns44.domaincontrol.com.
asnic.biz. 5 NS ns43.domaincontrol.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0