@ IN  SOA host11.domain.com. root.host11.domain.com. ( 5 10800 3600 604800 86400 )
  IN  NS  host11.domain.com.

15.8.168.192.IN-ADDR.ARPA.    	IN  PTR   host11.domain.com.
1.8.168.192.IN-ADDR.ARPA.     	IN  PTR   wall.domain.com.
3.8.168.192.IN-ADDR.ARPA.     	IN  PTR   pluto.domain.com.
8.8.168.192.IN-ADDR.ARPA.     	IN  PTR   ecom.domain.com.
12.8.168.192.IN-ADDR.ARPA.    	IN  PTR   sdb.domain.com.
21.8.168.192.IN-ADDR.ARPA.    	IN  PTR   musaka.domain.com.
22.8.168.192.IN-ADDR.ARPA.    	IN  PTR   jalapeno.domain.com.
23.8.168.192.IN-ADDR.ARPA.    	IN  PTR   icecream.domain.com.
24.8.168.192.IN-ADDR.ARPA.    	IN  PTR   dog.domain.com.