$TTL 2d
$ORIGIN 0.168.192.in-addr.arpa.
@			IN	SOA	ns.home.icebergh.us. orien@icebergh.us. (
				2016031801
				12h	    ; refresh interval
				15m	    ; update retry
				3w	    ; expiry
				3h	    ; minimum
			)

			IN	NS		ns.home.icebergh.us.

1			IN	PTR		gateway.home.icebergh.us.

20			IN	PTR		beast.home.icebergh.us.
21			IN	PTR		orihime.home.icebergh.us.