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IP Subnet Calculator
Calculate network, broadcast, mask and host range from an IP and CIDR.
Free · No sign-up · Updated August 2026
| Network address | 192.168.1.0 |
| Broadcast address | 192.168.1.255 |
| Subnet mask | 255.255.255.0 |
| Wildcard mask | 0.0.0.255 |
| First usable host | 192.168.1.1 |
| Last usable host | 192.168.1.254 |
| Usable hosts | 254 |
| Total addresses | 256 |
IPv4 subnet calculator — computes the network, broadcast, mask and host range for any CIDR block.
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
What do I enter?＋
An IPv4 address with a CIDR prefix, like 192.168.1.0/24.
What does it calculate?＋
The network and broadcast addresses, subnet and wildcard masks, host range and number of usable hosts.