Apex domains cannot have CNAME records.
Question and response
Question
dig bhnetwork.com. NS
Answer
bhnetwork.com. 5 NS ns-318.awsdns-39.com.
bhnetwork.com. 5 NS ns-904.awsdns-49.net.
bhnetwork.com. 5 NS ns-1179.awsdns-19.org.
bhnetwork.com. 5 NS ns-1591.awsdns-06.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0