/var/named/master/0.0.127.zone

$TTL 604800

@       IN      SOA     localhost. root.localhost. (
                        2016121801      ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800         ; Minimum TTL
                        )
;
       IN      NS      localhost.

1      IN      PTR     localhost.