deliverygateways2.mastercard.com has no CNAME records.
Question and response
Question
dig deliverygateways2.mastercard.com. NS
Answer
The response has no answer records.
Authority
mastercard.com. 188 SOA dns1.mastercard.com. hostmaster.mastercard.com. 2011131199 14400 3600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0