$TTL    3600

@       IN      SOA     indns1.in.ipa.go.jp.    root.indns1.in.ipa.go.jp. (
        2002012101      ;Serial
        3600            ;Refresh
        900             ;Retry
        3600000         ;Expire
        3600 )          ;Minimum

        IN      NS      indns1.in.ipa.go.jp.

indns1        IN      A       192.168.0.1
host1         IN      A       192.168.0.10
host2         IN      A       192.168.0.20