Subnet Calculator
Calculate subnet information from IP address and CIDR notation
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About Subnetting
- CIDR notation (e.g., /24) represents the number of network bits
- Common CIDR values: /8 (16.7M hosts), /16 (65K hosts), /24 (254 hosts)
- Network address is the first IP in the range
- Broadcast address is the last IP in the range
- Usable hosts = Total hosts - 2 (excluding network and broadcast)