Zone apex
Start of authority
Email
Serial
40
Refresh
3h
Retry
1h
Expire
28d
Negative cache TTL
15m
Question and response
Question
dig smtp.ucsd.edu. SOA
Answer
smtp.ucsd.edu. 300 SOA act-vnios-2.ucsd.edu. hostmaster.ucsd.edu. 40 10800 3600 2419200 900
Authority
smtp.ucsd.edu. 300 NS ns-auth3.ucsd.edu.
smtp.ucsd.edu. 300 NS ns-auth1.ucsd.edu.
smtp.ucsd.edu. 300 NS ns-auth2.ucsd.edu.
Additional
ns-auth1.ucsd.edu. 86400 A 44.227.162.249
ns-auth2.ucsd.edu. 86400 A 132.239.252.172
ns-auth3.ucsd.edu. 86400 A 132.239.252.186
ns-auth2.ucsd.edu. 86400 AAAA 2607:f720:100:202:0:0:0:174
ns-auth3.ucsd.edu. 86400 AAAA 2607:f720:f00:4446:0:0:0:186
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0