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IP Subnet Calculator

As useful tools are found, they will be placed on this page.

TCP/IP Subnetting Information

The following tables illustrate the IP subnetting details:

Class A Subnetting

 Max Bits Subnet Max # Hosts Subnet Mask
 0  0  16777214  255.0.0.0
 1  2 8388606 255.128.0.0
 2  4  4194302  255.192.0.0
 3  8 2097150  255.224.0.0
 4  16  1048574  255.240.0.0
 5  32  524286  255.248.0.0
 6  64  262142  255.252.0.0
 7  128  131070  255.254.0.0
 8  256  65534  255.255.0.0

Class B Subnetting

 Max Bits Subnet Max # Hosts Subnet Mask
 0  0 65534  255.255.0.0
 1  1 32766 255.255.128.0
 2  4  16382  255.255.192.0
 3  8 8190  255.255.224.0
 4  16  4094  255.255.240.0
 5  32  2046  255.255.248.0
 6  64  1022  255.255.252.0
 7  128  510  255.255.254.0
 8  256  254  255.255.255.0

Class C Subnetting

 Max Bits Subnet Max # Hosts Subnet Mask
 0  0 254  255.255.255.0
 1 2 126 255.255.255.223
 2 4 62  255.255.255.192
 3  8 30  255.255.255.224
 4  16  14  255.255.255.240
 5  32  6  255.255.255.248
 6  64  2  255.255.255.252
 7  invalid  invalid  invalid
 8  invalid  invalid  invalid

  
 
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