Question and response
Question
dig duoservers.com. NS
Answer
duoservers.com. 3600 NS dns1.duoservers.com.
duoservers.com. 3600 NS dns2.duoservers.com.
Authority
The response has no authority records.
Additional
dns1.duoservers.com. 3600 A 198.23.53.28
dns2.duoservers.com. 3600 A 198.23.53.30