IPv4 subnet matrix table

This table shows you what networks are part of what IPv4 prefixes.

# Subnet table:
# http://www.faqs.org/rfcs/rfc1878.html
#    FF.00.00.00    /8     255.0.0.0           16 M       1 A
#    FF.80.00.00    /9     255.128.0.0          8 M     128 B
#    FF.C0.00.00   /10     255.192.0.0          4 M      64 B
#    FF.E0.00.00   /11     255.224.0.0          2 M      32 B
#    FF.F0.00.00   /12     255.240.0.0       1024 K      16 B
#    FF.F8.00.00   /13     255.248.0.0        512 K       8 B
#    FF.FC.00.00   /14     255.252.0.0        256 K       4 B
#    FF.FE.00.00   /15     255.254.0.0        128 K       2 B
#    FF.FF.00.00   /16     255.255.0.0         64 K       1 B
#    FF.FF.80.00   /17     255.255.128.0       32 K     128 C
#    FF.FF.C0.00   /18     255.255.192.0       16 K      64 C
#    FF.FF.E0.00   /19     255.255.224.0        8 K      32 C
#    FF.FF.F0.00   /20     255.255.240.0        4 K      16 C
#    FF.FF.F8.00   /21     255.255.248.0        2 K       8 C
#    FF.FF.FC.00   /22     255.255.252.0        1 K       4 C
#    FF.FF.FE.00   /23     255.255.254.0      512         2 C
#    FF.FF.FF.00   /24     255.255.255.0      256         1 C
#    FF.FF.FF.80   /25     255.255.255.128    128       1/2 C
#    FF.FF.FF.C0   /26     255.255.255.192     64       1/4 C
#    FF.FF.FF.E0   /27     255.255.255.224     32       1/8 C
#    FF.FF.FF.F0   /28     255.255.255.240     16      1/16 C
#    FF.FF.FF.F8   /29     255.255.255.248      8      1/32 C
#    FF.FF.FF.FC   /30     255.255.255.252      4      1/64 C
#    FF.FF.FF.FE   /31     255.255.255.254      2     1/128 C

## /11 = X.0, X.32, X.64, X.96, X.128, X.160, X.192, X.224
#  /11 = 2 million people
## /12 = 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
## /13 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136
#      144 152 160 168 176 184 192 200 208 216 224 232 240 248 256