DNS report for zone “18sai.net”
Hostmaster for zone 18sai.net is:IP settings (as seen from ns4.sphere.ad.jp)
error
You have less than 2 nameservers. You need to have at least 2 nameservers!
warn
All of your nameservers resides in the same C-Net, this makes it very likely that they will be affected by the same outages. You should consider getting a secondary nameserver hosted somewhere else.
Mail settings (as seen from ns4.sphere.ad.jp)
Zone as seen from “ns.12sai.net” [210.150.167.231]
error
Host is not authorative!
Zone as seen from “ns4.sphere.ad.jp” [202.239.113.30]
error
Host is down!