tbms.datainfosys.net has no CNAME records.
Question and response
Question
dig tbms.datainfosys.net. NS
Answer
The response has no answer records.
Authority
datainfosys.net. 3359 SOA ns1.dildns.com. nishat.dil.in. 2012051005 3600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0