このページはあなたの指定言語の彼の無効性のために英語で掲示される MATRIX TABLE
For reasons of facilitated calculation I put the representation of all the bit of sub-network even if this one of it is not the real representation. 
  
  
    
      
          
            
              | allocated bits subnet mask | 
              IPv4 addresses number | 
              Equivalent space | 
             
            
              | 32 | 
              1 | 
              ppp ip | 
             
            
              | 31 | 
              2 | 
             
            
              | 30 | 
              4 -2 usables | 
             
            
              | 29 | 
              8 -2 usables | 
             
            
              | 28 | 
              16 -2 usables | 
               | 
             
            
              | 27 | 
              32 -2 usables | 
             
            
              | 26 | 
              64 -2 usables | 
             
            
              | 25 | 
              128 -2 usables | 
             
            
              | 24 | 
              256 -2 usables | 
              C Class | 
             
            
              | 23 | 
              512 -2 usables | 
             
            
              | 22 | 
              1024 -2 usables | 
             
            
              | 21 | 
              2048 -2 usables | 
               | 
             
            
              | 20 | 
              4096 -2 usables | 
               | 
             
            
              | 19 | 
              8192 -2 usables | 
               | 
             
            
              | 18 | 
              16384 -2 usables | 
               | 
             
            
              | 17 | 
              32768 -2 usables | 
               | 
             
            
              | 16 | 
              65536 -2 usables | 
              B Class | 
             
            
              | 16 | 
              131072 -2 usables | 
               | 
             
            
              | 15 | 
              262144 -2 usables | 
               | 
             
            
              | 14 | 
              524288 -2 usables | 
               | 
             
            
              | 13 | 
              1048576 -2 usables | 
               | 
             
            
              | 12 | 
              2097152 -2 usables | 
               | 
             
            
              | 11 | 
              4194304 -2 usables | 
               | 
             
            
              | 10 | 
              8388608 -2 usables | 
               | 
             
            
              | 09 | 
              16777216 -2 usables | 
               | 
             
            
              | 08 | 
              33554432 -2 usables | 
              A Class | 
             
            
              | 07 | 
              67108864 -2 usables | 
               | 
             
            
              | 06 | 
              134217728 -2 usables | 
               | 
             
            
              | 05 | 
              268435456 -2 usables | 
               | 
             
            
              | 04 | 
              536870912 -2 usables | 
               | 
             
            
              | 03 | 
              1073741824 -2 usables | 
               | 
             
            
              | 02 | 
              2147483648 -2 usables | 
               | 
             
            
              | 01 | 
              4294967296 -2 usables | 
               | 
             
          
          | 
     
  
 
  
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