IP Calculations
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This IP address calculator is just a convenient tool that saved
   us a lot of time. We do hope that it will be as useful for you as
   it is for us.

 

      Just enter (the Start IP address + End IP address) to get the relevant Subnet Mask,
         OR  enter (an IP address in the Start address + the Subnet Mask) to get the IP range.

Start address   (192.168.10.1) Number of hosts 
End address   (192.168.11.254) CIDR network 
Subnet mask   (255.255.254.0) Broadcast address 
Network class 

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