dns4.hwccustomers.com has no CNAME records.
Question and response
Question
dig dns4.hwccustomers.com. NS
Answer
The response has no answer records.
Authority
hwccustomers.com. 1444 SOA dns1.hwccustomers.com. itdept.hotwirecommunication.com. 2012504986 4800 900 691200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0