Apex domains cannot have CNAME records.
Question and response
Question
dig niceincontact.com. NS
Answer
niceincontact.com. 5 NS ns-51.awsdns-06.com.
niceincontact.com. 5 NS ns-1376.awsdns-44.org.
niceincontact.com. 5 NS ns-555.awsdns-05.net.
niceincontact.com. 5 NS ns-1905.awsdns-46.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0