ns2.web2010.com has no CNAME records.
Question and response
Question
dig ns2.web2010.com. NS
Answer
The response has no answer records.
Authority
web2010.com. 1 SOA ns.web2010.com. root.web2010.com. 200506080 10800 3600 604800 1
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0