Apex domains cannot have CNAME records.
Question and response
Question
dig static.hdcdatacentre.com. NS
Answer
static.hdcdatacentre.com. 5 NS ns01.hdcdatacentre.com.
static.hdcdatacentre.com. 5 NS ns02.hdcdatacentre.com.
Authority
The response has no authority records.
Additional
ns01.hdcdatacentre.com. 5 A 202.123.77.209
ns02.hdcdatacentre.com. 5 A 202.123.77.213
ns01.hdcdatacentre.com. 5 AAAA 2407:7200:2000:0:0:0:0:209
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0