ac2.cloudcone.net has no CNAME records.
Question and response
Question
dig ac2.cloudcone.net. NS
Answer
The response has no answer records.
Authority
cloudcone.net. 3149 SOA ac1.cloudcone.net. admin.cloudcone.com. 2025101301 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0