Apex domains cannot have CNAME records.
Question and response
Question
dig metrohive.net. NS
Answer
metrohive.net. 5 NS hive.neobee.net.
metrohive.net. 5 NS pcelica.neobee.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0