Subnet Calculator
Calculate network address, broadcast address, subnet mask, and usable host range from an IP address and CIDR prefix — free, right in your browser.
- 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
How to use the Subnet Calculator
- Enter an IPv4 address.
- Enter the CIDR prefix length (0-32).
- Network address, broadcast address, subnet mask, and usable host range update instantly.