ScaleWhite Tools

Subnet Calculator

Calculate network range, usable hosts, broadcast address from CIDR notation. Supports both IPv4 and IPv6.

What is this tool?

This tool calculates subnet information from IPv4 and IPv6 CIDR notation. It instantly computes network address, broadcast address, subnet mask, usable host count, and host range. Useful for network design and troubleshooting.

How to Use

  1. Enter a CIDR notation (e.g. 192.168.1.0/24) in the input field.
  2. Click the 'Calculate' button or press Enter.
  3. Network information will be displayed in a table.
  4. Use the copy button next to each value to copy individually.

Examples

  • 192.168.1.0/24 — Common Class C network (254 hosts)
  • 10.0.0.0/8 — Large private network
  • 2001:db8::/32 — IPv6 documentation prefix
  • 172.16.0.0/12 — Class B private network