Question and response
Question
dig external2.mastercard.com. SRV
Answer
The response has no answer records.
Authority
mastercard.com. 300 SOA dns1.mastercard.com. hostmaster.mastercard.com. 2011131199 14400 3600 2419200 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0