Subnet Calculator +

SubnetCalc is a fast, intuitive subnet calculator for networking professionals and students.

Features:
- IPv4 subnet calculator with live CIDR slider (1-30)
- Subnet Splitter for equal-split and VLSM subdivision
- IPv6 calculator with prefix slider (1-128)
- Auto-detect your device's IP and subnet from Wi-Fi
- Navigate between adjacent subnets
- Share or copy results instantly
- Native Mac support via Mac Catalyst

Enter any IP address, adjust the CIDR prefix with the slider, and instantly see:
- Subnet mask
- Network address
- Broadcast address
- Usable host range
- Maximum hosts
- Wildcard mask

The Subnet Splitter lets you divide a network into equal subnets or use VLSM to allocate subnets by host count. Perfect for network planning and design.

No ads. No tracking. No subscription.