IP Subnet Calculator
Calculate subnet masks, network addresses, broadcast addresses, and other IP subnetting information. Supports IPv4 addresses and CIDR notation.
Result:
Binary Representation
Notes
- CIDR notation represents the number of 1's in the subnet mask (e.g., /24 = 255.255.255.0)
- Network address is the first address in the subnet
- Broadcast address is the last address in the subnet
- Usable IP addresses exclude network and broadcast addresses
- Subnet mask determines the size of the network