ns3.memset.com has no CNAME records.
Question and response
Question
dig ns3.memset.com. NS
Answer
The response has no answer records.
Authority
memset.com. 744 SOA ns1.memset.com. hostmaster.memset.com. 1771772415 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0