Apex domains cannot have CNAME records.
Question and response
Question
dig globuz.info. NS
Answer
globuz.info. 5 NS linus.ns.1-grid.co.za.
globuz.info. 5 NS linus.ns.1-grid.com.
globuz.info. 5 NS linus.ns.1-grid.net.
globuz.info. 5 NS linus.ns.1-grid.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0