Apex domains cannot have CNAME records.
Question and response
Question
dig cimbgroup.info. NS
Answer
cimbgroup.info. 5 NS dns220.c.register.com.
cimbgroup.info. 5 NS dns176.d.register.com.
cimbgroup.info. 5 NS dns046.a.register.com.
cimbgroup.info. 5 NS dns069.b.register.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0