webmail.ipnoc.kcom.com has no CNAME records.
Question and response
Question
dig webmail.ipnoc.kcom.com. NS
Answer
The response has no answer records.
Authority
ipnoc.kcom.com. 10772 SOA ibex.kcom.com. hostmaster.kcom.com. 2010121102 28800 7200 604800 28800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0