Question and response
Question
dig clients.your-server.de. NS
Answer
clients.your-server.de. 600 NS ns1.your-server.de.
clients.your-server.de. 600 NS ns.second-ns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0