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Tools > IP/CIDR Subnet Calculator

IP/CIDR Subnet Calculator

Calculate subnet mask, network, broadcast and host range from CIDR

🔒 This tool runs in your browser only. No input data is sent to any server.

About IP/CIDR Subnet Calculator

IP/CIDR Subnet Calculator computes network details from an IP address and subnet mask or CIDR notation. View network address, broadcast address, usable host range, wildcard mask, and total number of hosts. Supports both IPv4 addresses and CIDR block notation.

How to Use

  1. Enter an IP address with CIDR notation (e.g., 192.168.1.0/24).
  2. Or enter an IP address and select a subnet mask.
  3. View computed network details: range, broadcast, hosts, etc.
  4. Copy any calculated value with one click.

Key Features

  • Calculate network address, broadcast, and host range from CIDR
  • Support for IPv4 addresses with any subnet mask
  • Display usable host count and wildcard mask
  • Visual subnet breakdown for network planning