Subnet Calculator - IPv4 Network Planning Tool

Calculate IPv4 subnet properties from IP address and CIDR notation or subnet mask. View network address, broadcast address, host range, binary representation, and divide networks into smaller subnets.

Features

• CIDR notation and subnet mask input with automatic conversion
• Network properties: network address, broadcast, first/last host, total/usable hosts
• Subnet mask and wildcard mask display
• IP class and type identification (private, public, loopback, multicast)
• Hex and integer IP representations
• Binary representation with network/host bit visualization
• Subnet division into 2, 4, 8, 16, 32, 64, 128, or 256 subnets
• Quick CIDR prefix buttons for common subnet sizes
• Copy all results to clipboard