Apex domains cannot have CNAME records.
Question and response
Question
dig t1cloud.com. NS
Answer
t1cloud.com. 5 NS ns-1351.awsdns-40.org.
t1cloud.com. 5 NS ns-1774.awsdns-29.co.uk.
t1cloud.com. 5 NS ns-23.awsdns-02.com.
t1cloud.com. 5 NS ns-989.awsdns-59.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0