ns2.ipower.com has no CNAME records.
Question and response
Question
dig ns2.ipower.com. NS
Answer
The response has no answer records.
Authority
IPOWER.com. 2895 SOA ns1.ipowerweb.net. hostmaster.ipowerweb.net. 2007042301 80000 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0