dns.instandomainsearch.com has no CNAME records.
Question and response
Question
dig dns.instandomainsearch.com. NS
Answer
The response has no answer records.
Authority
instandomainsearch.com. 3394 SOA dns.instandomainsearch.com. hostmaster.instandomainsearch.com. 1474418046 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0