Apex domains cannot have CNAME records.
Question and response
Question
dig datamine.com. NS
Answer
datamine.com. 5 NS ns.freeparking.co.nz.
datamine.com. 5 NS ns2.freeparking.co.nz.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0