Apex domains cannot have CNAME records.
Question and response
Question
dig nimag.net. NS
Answer
nimag.net. 5 NS ns2.nimag.net.
nimag.net. 5 NS ns1.nimag.net.
Authority
The response has no authority records.
Additional
ns1.nimag.net. 5 A 62.220.128.88
ns2.nimag.net. 5 A 62.220.150.88
ns1.nimag.net. 5 AAAA 2001:788:0:0:0:0:0:88
ns2.nimag.net. 5 AAAA 2001:789:0:0:0:0:0:89
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0