IP Subnet Calculator
Calculate subnet masks, network addresses, broadcast addresses, and host ranges. Supports IPv4 CIDR notation and provides a detailed subnet breakdown with export functionality.
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Enter an IP address and subnet mask or CIDR notation, then click Calculate
IPv4 Address & Subnet
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Settings
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Results
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Enter an IP address and click Calculate
📊 Subnet Listing & Subnetting
Shows all subnets for a given network. Choose the number of subnets or the desired subnet size to automatically compute subnet divisions.
| # | Network Address | Usable Host Range | Broadcast | Hosts | CIDR |
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📖 CIDR / Subnet Mask Reference
Quick reference for all IPv4 CIDR notations, their subnet masks, wildcard masks, and host counts.
| CIDR | Subnet Mask | Wildcard Mask | Total IPs | Usable Hosts | Class |
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