mta12.us.11.ncdelivery04.com has no CNAME records.
Question and response
Question
dig mta12.us.11.ncdelivery04.com. NS
Answer
The response has no answer records.
Authority
ncdelivery04.com. 10800 SOA ns1.ncdelivery04.com. Postmaster.ncdelivery04.com. 639748623 10800 3600 172800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0