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Subnet Calculator

Calculate network subnets and IP ranges

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What is Subnet Calculator?

IP subnet calculation is essential for network design, cloud infrastructure configuration, and firewall rules. A subnet calculator takes an IP address and CIDR notation (like 192.168.1.0/24) and returns the network address, broadcast address, usable host range, subnet mask, wildcard mask, and total host count. DailyDevTools' Subnet Calculator handles both IPv4 and IPv6 subnets.

How to use Subnet Calculator

  1. 1Enter an IP address with CIDR prefix (e.g., 192.168.1.0/24) or enter IP and subnet mask separately
  2. 2The calculator instantly shows network address, broadcast address, first and last usable hosts
  3. 3View the subnet mask in both dotted decimal and CIDR notation
  4. 4Use the subnet divider to split a network into smaller subnets of a specified size

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