$TTL    86400                     ; 24 hours
$ORIGIN localhost.

localhost.  86400   IN  SOA localhost. root.localhost. (
                         20120201 ; serial
                         3H       ; refresh
                         15       ; retry
                         1w       ; expire
                         3h       ; minimum
                        )

            86400   IN  NS      localhost.
            86400   IN  A       127.0.0.1