Apex domains cannot have CNAME records.
Question and response
Question
dig thefifthnetwork.com. NS
Answer
thefifthnetwork.com. 5 NS ns-194.awsdns-24.com.
thefifthnetwork.com. 5 NS ns-603.awsdns-11.net.
thefifthnetwork.com. 5 NS ns-433.awsdns-54.com.
thefifthnetwork.com. 5 NS ns-831.awsdns-39.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0