$TTL 86400
@     1D  IN	SOA     dns.example.jp. postmaster.example.jp.  (
                                      2003010108 ; Serial
                                      10800      ; Refresh
                                      3600       ; Retry
                                      604800     ; Expire
                                      86400 )    ; Minimum

      1D  IN	NS	dns.example.jp.
55    1D  IN	PTR	dns.example.jp.