Zone apex
Start of authority
Email
Serial
2006031103
Refresh
8h
Retry
2h
Expire
7d
Negative cache TTL
10m
Question and response
Question
dig smtpb1.bt.com. SOA
Answer
The response has no answer records.
Authority
bt.com. 0 SOA EDDNS0.BT.COM. zzdnsr.bt.com. 2006031103 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0