unknown.scnet.net has no CNAME records.
Question and response
Question
dig unknown.scnet.net. NS
Answer
The response has no answer records.
Authority
scnet.net. 2302 SOA ns1.servercentral.net. hostmaster.servercentral.net. 2026022308 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0