How to use the Subnet & CIDR Calculator
- Enter IPv4 address.
- Enter CIDR prefix length.
- Tap Calculate to see the result.
- Tap Reset to clear the fields and try again.
Last updated: 1 November 2026
Subnet & CIDR Calculator
Network, broadcast and host range for an IPv4 subnet.
Result
Fill in the fields and tap Calculate to see your result.