Apex domains cannot have CNAME records.
Question and response
Question
dig proinity.net. NS
Answer
proinity.net. 2 NS ns-1383.awsdns-44.org.
proinity.net. 2 NS ns-1944.awsdns-51.co.uk.
proinity.net. 2 NS ns-79.awsdns-09.com.
proinity.net. 2 NS ns-714.awsdns-25.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0