Apex domains cannot have CNAME records.
Question and response
Question
dig ladesk.com. NS
Answer
ladesk.com. 5 NS ns-1251.awsdns-28.org.
ladesk.com. 5 NS ns-933.awsdns-52.net.
ladesk.com. 5 NS ns-208.awsdns-26.com.
ladesk.com. 5 NS ns-1839.awsdns-37.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0