Networking & IT Tools
Subnet Calculator
Enter an IP address and CIDR prefix to calculate the network address, broadcast address, usable host range, and host count.
| Network address | 192.168.1.0 |
| Broadcast address | 192.168.1.255 |
| Subnet mask | 255.255.255.0 |
| First usable host | 192.168.1.1 |
| Last usable host | 192.168.1.254 |
| Usable hosts | 254 |
| Total addresses | 256 |
How to use this tool
- 1Enter an IPv4 address.
- 2Set the CIDR prefix length.
- 3See the full subnet breakdown.
Frequently asked questions
What's the difference between network and broadcast address?+
The network address identifies the subnet itself (all host bits zero); the broadcast address targets every host on the subnet (all host bits one) — neither is usually assignable to a device.