dns2.t-2.net has no CNAME records.
Question and response
Question
dig dns2.t-2.net. NS
Answer
The response has no answer records.
Authority
t-2.net. 3600 SOA dns1.t-2.net. dns.t-2.net. 1772471654 28800 3600 1209600 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0