IP Subnet Calculator
Calculate network address, broadcast IP, host range, and subnet mask from any CIDR notation.
Free Runs in your browser Web Tools
How to use
- 1 Enter an IP address in CIDR notation (e.g. 192.168.1.0/24) into the input field.
- 2 Click Calculate — the tool computes the network address, broadcast address, subnet mask, and usable host range.
- 3 Check the number of usable host addresses for your subnet prefix.
- 4 Use the results to plan your network topology or configure firewall rules.
Key features
- Calculates network address, broadcast, subnet mask, and usable host range
- Supports all CIDR prefixes from /0 to /32
- Shows the number of usable host addresses
- Useful for network planning, firewall rules, and cloud VPC configuration