Apex domains cannot have CNAME records.
Question and response
Question
dig herdundhaus.com. NS
Answer
herdundhaus.com. 4 NS ns2.herdundhaus.com.
herdundhaus.com. 4 NS ns1.herdundhaus.com.
Authority
The response has no authority records.
Additional
ns1.herdundhaus.com. 4 A 172.245.84.186
ns2.herdundhaus.com. 4 A 104.140.115.54
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0