hostmaster.asuscomm.com has no CNAME records.
Question and response
Question
dig hostmaster.asuscomm.com. NS
Answer
The response has no answer records.
Authority
asuscomm.com. 8035 SOA ns-nw.asuscomm.com. hostmaster.asuscomm.com. 50 28800 7200 604800 120
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0