johngg@shiraz:~/perl/utils$ for i in `seq 11 15`; do ./tellNetwork --address 17.23.175.209/$i; done

IP address   : 00010001 00010111 10101111 11010001 : 17.23.175.209
Netmask      : 11111111 11100000 00000000 00000000 : 255.224.0.0
Network      : 00010001 00000000 00000000 00000000 : 17.0.0.0/11
Low address  : 00010001 00000000 00000000 00000001 : 17.0.0.1
High address : 00010001 00011111 11111111 11111111 : 17.31.255.255


IP address   : 00010001 00010111 10101111 11010001 : 17.23.175.209
Netmask      : 11111111 11110000 00000000 00000000 : 255.240.0.0
Network      : 00010001 00010000 00000000 00000000 : 17.16.0.0/12
Low address  : 00010001 00010000 00000000 00000001 : 17.16.0.1
High address : 00010001 00011111 11111111 11111111 : 17.31.255.255


IP address   : 00010001 00010111 10101111 11010001 : 17.23.175.209
Netmask      : 11111111 11111000 00000000 00000000 : 255.248.0.0
Network      : 00010001 00010000 00000000 00000000 : 17.16.0.0/13
Low address  : 00010001 00010000 00000000 00000001 : 17.16.0.1
High address : 00010001 00010111 11111111 11111111 : 17.23.255.255


IP address   : 00010001 00010111 10101111 11010001 : 17.23.175.209
Netmask      : 11111111 11111100 00000000 00000000 : 255.252.0.0
Network      : 00010001 00010100 00000000 00000000 : 17.20.0.0/14
Low address  : 00010001 00010100 00000000 00000001 : 17.20.0.1
High address : 00010001 00010111 11111111 11111111 : 17.23.255.255


IP address   : 00010001 00010111 10101111 11010001 : 17.23.175.209
Netmask      : 11111111 11111110 00000000 00000000 : 255.254.0.0
Network      : 00010001 00010110 00000000 00000000 : 17.22.0.0/15
Low address  : 00010001 00010110 00000000 00000001 : 17.22.0.1
High address : 00010001 00010111 11111111 11111111 : 17.23.255.255

johngg@shiraz:~/perl/utils$ ./tellNetwork --address 203.176.10.197 --hexmask ffffffe0

IP address   : 11001011 10110000 00001010 11000101 : 203.176.10.197
Netmask      : 11111111 11111111 11111111 11100000 : 255.255.255.224
Network      : 11001011 10110000 00001010 11000000 : 203.176.10.192/27
Low address  : 11001011 10110000 00001010 11000001 : 203.176.10.193
High address : 11001011 10110000 00001010 11011111 : 203.176.10.223