memory.successinet.com has no CNAME records.
Question and response
Question
dig memory.successinet.com. NS
Answer
The response has no answer records.
Authority
successinet.com. 3420 SOA ns1.successinet.com. hostmaster.successinet.com. 2018042516 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0