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.