Question and response
Question
dig cscudns.com. NS
Answer
cscudns.com. 86400 NS udns1.cscudns.com.
cscudns.com. 86400 NS udns2.cscudns.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0