IP Subnet Calculator
A tool for performing subnet calculations needed for network design and administration, instantly computing network address, broadcast address, usable host range, and host count from any IP address and subnet mask. It supports both CIDR notation (/24, /16) and dotted-decimal subnet mask input. Essential for network engineers designing subnet architectures, system administrators troubleshooting connectivity issues, and IT students learning IP addressing concepts.
How it works
- Uses AES-GCM 256-bit encryption
- Key derived from password using PBKDF2 (100,000 iterations)
- All processing is done in the browser (no data sent to server)
- The same password used for encryption is required for decryption
IP Subnet Calculator Features
- Calculate network info from IP address and CIDR/subnet mask
- Display network and broadcast addresses
- Calculate usable host count and range
- Useful for network design and troubleshooting
How to Use
- 1Enter IP address and subnet mask (CIDR notation)
- 2Review network info (address, broadcast, host range)
- 3Copy needed information for use
FAQ
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