Apex domains cannot have CNAME records.
Question and response
Question
dig leaddesk.com. NS
Answer
leaddesk.com. 5 NS ns-589.awsdns-09.net.
leaddesk.com. 5 NS ns-1231.awsdns-25.org.
leaddesk.com. 5 NS ns-1976.awsdns-55.co.uk.
leaddesk.com. 5 NS ns-233.awsdns-29.com.
Authority
The response has no authority records.
Additional
ns-589.awsdns-09.net. 2 A 205.251.194.77
ns-1231.awsdns-25.org. 2 A 205.251.196.207
ns-1976.awsdns-55.co.uk. 2 A 205.251.199.184
ns-233.awsdns-29.com. 2 AAAA 2600:9000:5300:e900:0:0:0:1
ns-589.awsdns-09.net. 2 AAAA 2600:9000:5302:4d00:0:0:0:1
ns-1231.awsdns-25.org. 2 AAAA 2600:9000:5304:cf00:0:0:0:1
ns-1976.awsdns-55.co.uk. 2 AAAA 2600:9000:5307:b800:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0