Calculate network address, broadcast, usable host IP range, and masks.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Type an IPv4 address and CIDR prefix (e.g., 192.168.1.0/24).
View calculated network address, broadcast address, netmask, wildcard mask, and usable host range.
Copy the subnet breakdown and binary representations for firewall and routing configuration.
A /24 subnet provides 256 total IP addresses and 254 usable host addresses (excluding network and broadcast).
Yes, you can enter prefix notation or select standard subnet masks from the dropdown.
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