Apex domains cannot have CNAME records.
Question and response
Question
dig infapp.net. NS
Answer
infapp.net. 5 NS ns-726.awsdns-26.net.
infapp.net. 5 NS ns-299.awsdns-37.com.
infapp.net. 5 NS ns-1985.awsdns-56.co.uk.
infapp.net. 5 NS ns-1122.awsdns-12.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0