Zone apex
Start of authority
Email
Serial
1
Refresh
2h
Retry
15m
Expire
14d
Negative cache TTL
1d
Question and response
Question
dig spf-report.com. SOA
Answer
spf-report.com. 900 SOA ns-588.awsdns-09.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Authority
spf-report.com. 172800 NS ns-1442.awsdns-52.org.
spf-report.com. 172800 NS ns-1567.awsdns-03.co.uk.
spf-report.com. 172800 NS ns-588.awsdns-09.net.
spf-report.com. 172800 NS ns-92.awsdns-11.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0