🌐 Smart Subnet Calculator
Enter IPv4 address and netmask to calculate network bounds, usable range, and gateway matching.
LAN Presets:
Network Configuration
FIRST USABLE IP
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LAST USABLE IP
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USABLE HOST QTY
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Calculation Details
| 网络地址 (Network) | - |
| 广播地址 (Broadcast) | - |
| 子网掩码 (Netmask) | - |
| CIDR 路由前缀 | - |
| IP 总数 (含广播/网段) | - |
| 网关匹配状态 | - |