Question and response
Question
dig ns2.cao-sh.com. NS
Answer
ns2.cao-sh.com. 5 CNAME cao-sh.com.
cao-sh.com. 5 NS ns2.cao-sh.com.
cao-sh.com. 5 NS ns1.cao-sh.com.
Authority
The response has no authority records.
Additional
ns1.cao-sh.com. 5 A 188.93.140.225
ns2.cao-sh.com. 5 A 188.93.140.243
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0