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Subnet Calculator:

This utility calculates the network address and broadcast address that a given IP address is associated with. A maximum of three decimal characters (0-9) per box with a decimal value of between 0 (zero) and 255 is required. If the value is 0, enter 0 (zero). The network prefix length is assumed to be in hex; a maximum of 2 hex characters are allowed.

Required TCP/IP Address Entry
Specify A Network Address . . .
Select One Of The Following Methods
Subnet Mask . . .
Network Prefix Length
  
Calculated TCP/IP Network Information
Network Address . . .
Address of First Host . . .
Address of Last Host . . .
Broadcast Address . . .

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