dd26728.kasserver.com has no CNAME records.
Question and response
Question
dig dd26728.kasserver.com. NS
Answer
The response has no answer records.
Authority
kasserver.com. 7084 SOA ns5.kasserver.com. hostmaster.kasserver.com. 2602251920 28800 7200 1209600 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0