Question and response
Question
dig ns2.heartintraining.com. EUI64
Answer
ns2.heartintraining.com. 5 CNAME heartintraining.com.
Authority
heartintraining.com. 3600 SOA ns-460.awsdns-57.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0