Apex domains cannot have CNAME records.
Question and response
Question
dig xtscloud.net. NS
Answer
xtscloud.net. 1 NS ns-569.awsdns-07.net.
xtscloud.net. 1 NS ns-1845.awsdns-38.co.uk.
xtscloud.net. 1 NS ns-276.awsdns-34.com.
xtscloud.net. 1 NS ns-1045.awsdns-02.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0