Question and response
Question
dig unsetptr.inttech.de. NS
Answer
unsetptr.inttech.de. 5 CNAME www.int-tech.de.
Authority
int-tech.de. 192 SOA ns.inttech.de. info.int-tech.de. 2015062504 300 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0