matrix# cat boooom.org
$TTL 86400
@               IN      SOA     ns1.boooom.org.        admin.boooom.org. (
                        2005111201 ; serial
                        28800 ; refresh
                        14400 ; retry
                        3600000 ; expire
                        86400 ; default_ttl
                        )
@               IN      NS      ns1.boooom.org.
@               IN      NS      ns2.boooom.org.

boooom.org.             IN      A       72.10.162.130
vhost1.boooom.org.      IN      A       72.10.162.131
vhost2.boooom.org.      IN      A       72.10.162.132
vhost3.boooom.org.      IN      A       67.43.226.2
Try.to.be.h4ker.net.    IN      A       67.43.226.21

$ORIGIN 162.10.72.boooom.org.
130     IN      PTR     boooom.org.
131     IN      PTR     vhost1.boooom.org.
132     IN      PTR     vhost2.boooom.org.

$ORIGIN 226.43.67.boooom.org.
2      IN     PTR       vhost3.boooom.org.
3      IN     PTR       free.
4      IN     PTR       free.
21     IN     PTR       Try.to.be.h4ker.net.
matrix#