Apex domains cannot have CNAME records.
Question and response
Question
dig tmes.trendmicro.eu. NS
Answer
tmes.trendmicro.eu. 5 NS ns-268.awsdns-33.com.
tmes.trendmicro.eu. 5 NS ns-1906.awsdns-46.co.uk.
tmes.trendmicro.eu. 5 NS ns-1126.awsdns-12.org.
tmes.trendmicro.eu. 5 NS ns-557.awsdns-05.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0