ns3k.aureon.com has no CNAME records.
Question and response
Question
dig ns3k.aureon.com. NS
Answer
The response has no answer records.
Authority
aureon.com. 3334 SOA ns3k.aureon.com. hostmaster.netins.net. 2017103601 1800 3000 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0