Our subnet calculator and VLSM planner is designed specifically for network administrators, engineers, and IT professionals who need reliable, accurate subnet calculations on a daily basis.
Unlike many web-based tools that require sending sensitive network data to external servers, our calculator runs entirely in your browser, ensuring your network configurations remain private and secure.
Calculate network details, broadcast addresses, usable IP ranges, and binary representations for any CIDR notation.
Plan Variable Length Subnet Masking configurations with automatic optimal subnet allocation based on host requirements.
All calculations are performed locally in your browser. No data is sent to external servers or stored.
This project is open source and available on GitHub. Contributions, bug reports, and feature requests are welcome.
Plan IP address schemes, troubleshoot network connectivity, and validate subnet configurations.
Design network infrastructure, optimize IP allocation, and ensure efficient subnet usage.
Learn subnetting concepts, understand CIDR notation, and practice network design principles.
Validate network configurations for cloud deployments and infrastructure automation.