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CIDR Subnet Calculator

  • Click the buttons under Template inputs to populate input fields with example values.
    After that, inputs can also be modified manually.
  • The CIDR must be larger than or equal to the Reserved CIDR.
    The Reserved CIDR must be smaller than or equal to the CIDR.
  • See also: ARIN - IPv4 Private Address Space and Filtering
Input
Template inputs
Address
Decimal
Hexadecimal
Binary
Network reserved :
0 bits
Network usable :
0 bits
Host :
0 bits
Netmask
Decimal
Hexadecimal
Binary
Network reserved :
0 bits
Network usable :
0 bits
Host :
0 bits
Number of networks
Total
0
Reserved
0
Usable
0
Number of hosts per network
Total
0
Usable
0
Subnet list