Zone apex
Start of authority
Email
Serial
220
Refresh
1h
Retry
10m
Expire
7d
Negative cache TTL
30m
Question and response
Question
dig spf.rev.io. SOA
Answer
The response has no answer records.
Authority
rev.io. 1800 SOA ns1-03.azure-dns.com. domreg.overgroup.com. 220 3600 600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0