Apex domains cannot have CNAME records.
Question and response
Question
dig ul360.com. NS
Answer
ul360.com. 5 NS ns-1419.awsdns-49.org.
ul360.com. 5 NS ns-1712.awsdns-22.co.uk.
ul360.com. 5 NS ns-123.awsdns-15.com.
ul360.com. 5 NS ns-725.awsdns-26.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0