CIDR Calculator

Calculates CIDR and IPv4 ranges.

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Nothing to calculate. Try entering the following:
  • 10.1.1.0/24
  • 10.1.1.0/255.255.255.0
  • 10.1.3.0 - 10.1.3.255
  • 10.1.3.55 to 10.1.6.34