linux-admin.esx.vm.dmz.neotelecoms.com has no CNAME records.
Question and response
Question
dig linux-admin.esx.vm.dmz.neotelecoms.com. NS
Answer
The response has no answer records.
Authority
neotelecoms.com. 3536 SOA nsauth1.dns.neotelecoms.com. si.neotelecoms.com. 2025101001 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0