Apex domains cannot have CNAME records.
Question and response
Question
dig streamfirewall.com. NS
Answer
streamfirewall.com. 5 NS ns-1210.awsdns-23.org.
streamfirewall.com. 5 NS ns-1370.awsdns-43.org.
streamfirewall.com. 5 NS ns-1012.awsdns-62.net.
streamfirewall.com. 5 NS ns-1166.awsdns-17.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0