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Subnet Calculator

Calculate CIDR subnet details like network, broadcast and host count.

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Enter IP address and CIDR to calculate subnet info

What is Subnet Calculator?

Subnet calculator computes network information from an IP address and subnet mask, including network address, broadcast address, and host range.

Calculated Information

  • Network address
  • Broadcast address
  • First and last usable host
  • Number of hosts
  • CIDR notation

Use Cases

  • Network planning
  • IP address allocation
  • Network troubleshooting