ns6.cimb.com has no CNAME records.
Question and response
Question
dig ns6.cimb.com. NS
Answer
The response has no answer records.
Authority
cimb.com. 243 SOA bhqkpk400206.cimbmy.cimbdomain.com. postmaster.cimb.com. 1472 10800 3600 2592000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0