Apex domains cannot have CNAME records.
Question and response
Question
dig tmes-stg.trendmicro.com. NS
Answer
tmes-stg.trendmicro.com. 5 NS ns-28.awsdns-03.com.
tmes-stg.trendmicro.com. 5 NS ns-1874.awsdns-42.co.uk.
tmes-stg.trendmicro.com. 5 NS ns-1434.awsdns-51.org.
tmes-stg.trendmicro.com. 5 NS ns-965.awsdns-56.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0