Apex domains cannot have CNAME records.
Question and response
Question
dig ijp88-vip.com. NS
Answer
ijp88-vip.com. 3 NS ns-425.awsdns-53.com.
ijp88-vip.com. 3 NS ns-1243.awsdns-27.org.
ijp88-vip.com. 3 NS ns-2004.awsdns-58.co.uk.
ijp88-vip.com. 3 NS ns-305.awsdns-38.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0