mx5.neotelecoms.com has no CNAME records.
Question and response
Question
dig mx5.neotelecoms.com. NS
Answer
The response has no answer records.
Authority
neotelecoms.com. 735 SOA nsauth1.dns.neotelecoms.com. si.neotelecoms.com. 2025101001 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0