duoservers.com CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig duoservers.com. NS

Answer

duoservers.com. 1 NS dns1.duoservers.com. duoservers.com. 1 NS dns2.duoservers.com.

Authority

The response has no authority records.

Additional

dns1.duoservers.com. 1 A 198.23.53.28 dns2.duoservers.com. 1 A 198.23.53.30 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0