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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: 192.168.2.18, 255.255.255.240

This tools can also be useful solving many CCNA exam style subnetting questions such as:
- Which subnet will host 192.168.2.18 belong to, as per the mask 255.255.255.240?
- What is the network address for a host with the IP address given by 123.200.8.68 255.255.255.192 ?
...and so on.


IP Address
Subnet Mask