SOA
Start of Authority
Primary NS
Mailbox
dns-admin.google.com
Serial
21
Refresh
21600
Retry
3600
Expire
1209600
Minimum TTL
300
NS
Nameservers
MX
Mail Exchangers
TXT
TXT Records
v=spf1 mx ~all
v=spf1 include:_spf.google.com ~all
A
IPv4 Addresses
AAAA