Zone apex
Start of authority
Email
Serial
672140
Refresh
3h
Retry
1h
Expire
7d
Negative cache TTL
1h
Question and response
Question
dig spf310.gcb.su. SOA
Answer
The response has no answer records.
Authority
gcb.su. 3600 SOA ns-mail03.getcourse.ru. hostmaster.gcb.su. 672140 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0