|           Nets              
                                   | 0-127 | 128-191 | 192-223   
Bits | Mask | CIDR | Hosts         |  A    |    B    |    C      
                                                                 
 128 |  128 |   /1 | 2,147,483,648 | 128   | 32,768  | 8,388,608 
  64 |  192 |   /2 | 1,073,741,824 |  64   | 16,384  | 4,194,304 
  32 |  224 |   /3 | 536,870,912   |  32   | 8,192   | 2,097,152 
  16 |  240 |   /4 | 268,435,456   |  16   | 4,096   | 1,048,576 
   8 |  248 |   /5 | 134,217,728   |   8   | 2,048   | 524,288   
   4 |  252 |   /6 | 67,108,864    |   4   | 1,024   | 262,144   
   2 |  254 |   /7 | 33,554,432    |   2   | 512     | 131,072   
   1 |  255 |   /8 | 16,777,216    |   1   | 256     | 65,536    
                                                                 
 128 |  128 |   /9 | 8,388,608     | 1/2   | 128     | 32,768    
  64 |  192 |  /10 | 4,194,304     | 1/4   |  64     | 16,384    
  32 |  224 |  /11 | 2,097,152     | 1/8   |  32     | 8,192     
  16 |  240 |  /12 | 1,048,576     | 1/16  |  16     | 4,096     
   8 |  248 |  /13 | 524,288       | 1/32  |   8     | 2,048     
   4 |  252 |  /14 | 262,144       | 1/64  |   4     | 1,024     
   2 |  254 |  /15 | 131,072       | 1/128 |   2     | 512       
   1 |  255 |  /16 | 65,536        | 1/256 |   1     | 256       
                                                                 
 128 |  128 |  /17 | 32,768        |       | 1/2     | 128       
  64 |  192 |  /18 | 16,384        |       | 1/4     |  64       
  32 |  224 |  /19 | 8,192         |       | 1/8     |  32       
  16 |  240 |  /20 | 4,096         |       | 1/16    |  16       
   8 |  248 |  /21 | 2,048         |       | 1/32    |   8       
   4 |  252 |  /22 | 1,024         |       | 1/64    |   4       
   2 |  254 |  /23 | 512           |       | 1/128   |   2       
   1 |  255 |  /24 | 256           |       | 1/256   |   1       
                                                                 | Nets | Hosts 
 128 |  128 |  /25 | 128           |       |         | 1/2       | 2    | 126   
  64 |  192 |  /26 | 64            |       |         | 1/4       | 4    |  62   
  32 |  224 |  /27 | 32            |       |         | 1/8       | 8    |  30   
  16 |  240 |  /28 | 16            |       |         | 1/16      | 16   |  14   
   8 |  248 |  /29 | 8             |       |         | 1/32      | 32   |   6   
   4 |  252 |  /30 | 4             |       |         | 1/64      | 64   |   2   
   2 |  254 |  /31 | 2             |       |         | 1/128     | 128  |   0   
   1 |  255 |  /32 | 1             |       |         | 1/256     | 255  |   0