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@               IN      SOA     dns.gakka.utsunomiya-u.ac.jp.  postmaster.dns.gakka.utsunomiya-u.ac.jp. (
                                        19971006; Serial
                                        10800   ; Refresh every 3 hours
                                        3600    ; Retry every hour
                                        3600000 ; Expire after a week
                                        86400 ) ; Minimum ttl of 1 day
                IN      NS      plamo.gakka.utsunomiya-u.ac.jp.
1               IN      PTR     localhost.