ntinstall.tailormadeservers.com has no CNAME records.
Question and response
Question
dig ntinstall.tailormadeservers.com. NS
Answer
The response has no answer records.
Authority
tailormadeservers.com. 5068 SOA ns.tailormadeservers.com. PostMaster.tailormadeservers.com. 2025120861 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0