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Subnetting Calculator

Submit an IP Address and subnet mask and get information such as:
  • Network address
  • All possible subnets
  • Class & type of the IP address
  • Hosts per subnet, subnets
  • Binary representations of the address information
Sample IP & Subnet Mask:,

This tools can also be useful solving many CCNA exam style subnetting questions such as:
- Which subnet will host belong to, as per the mask
- What is the network address for a host with the IP address given by ?
...and so on.

IP Address
Subnet Mask