postfix.har.com SOA records

SOA Start of authority
5m
Zone apex
Start of authority
Email
Serial
2019070801
Refresh
1h
Retry
5m
Expire
21d
Negative cache TTL
5m

Question and response

Question

dig postfix.har.com. SOA

Answer

The response has no answer records.

Authority

har.com. 3600 SOA ns-612.awsdns-12.net. awsdns-hostmaster.amazon.com. 2019070801 3600 300 1814400 300

Additional

. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0