Zone apex
Start of authority
Email
Serial
1
Refresh
2h
Retry
15m
Expire
14d
Negative cache TTL
1d
Question and response
Question
dig inbound-smtp.us-west-2.amazonaws.com. SOA
Answer
inbound-smtp.us-west-2.amazonaws.com. 900 SOA ns-1635.awsdns-12.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Authority
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-1152.awsdns-16.org.
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-1635.awsdns-12.co.uk.
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-453.awsdns-56.com.
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-585.awsdns-09.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0