ns2.serverdata.net has no CNAME records.
Question and response
Question
dig ns2.serverdata.net. NS
Answer
The response has no answer records.
Authority
serverdata.net. 3293 SOA ns2.serverdata.net. hostmaster.serverdata.net. 2026022240 3600 1800 1814400 3601
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0