$TTL 1D
$ORIGIN dom110.ict.jp.
@       IN SOA  host110 root (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        IN      NS      host110.dom110.ict.jp.
        IN      MX      10      mail.dom110.ict.jp.
host110 IN      A       192.168.1.110
mail    IN      A       192.168.1.110
www     IN      A       192.168.1.110