chemnitz.nic.xlink.net has no CNAME records.
Question and response
Question
dig chemnitz.nic.xlink.net. NS
Answer
The response has no answer records.
Authority
nic.xlink.net. 1621 SOA karlsruhe.nic.xlink.net. hostmaster.xlink.net. 2016080100 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0