Zone apex
Start of authority
Email
Serial
2025090701
Refresh
30m
Retry
10m
Expire
7d
Negative cache TTL
1h
Question and response
Question
dig spf.usa.net. SOA
Answer
spf.usa.net. 360 SOA cndvg001.usa.net. hostmaster.usa.net. 2025090701 1800 600 604800 3600
Authority
spf.usa.net. 360 NS dnsext01.usa.net.
spf.usa.net. 360 NS dnsext02.usa.net.
Additional
dnsext01.usa.net. 900 A 165.212.55.54
dnsext02.usa.net. 900 A 165.212.55.55
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0