or download this
johngg@shiraz:~/perl/utils$ for i in `seq 11 15`; do ./tellNetwork --a
+ddress 17.23.175.209/$i; done
...
Low address : 11001011 10110000 00001010 11000001 : 203.176.10.193
High address : 11001011 10110000 00001010 11011111 : 203.176.10.223