网络工具 / 子网划分
CIDR 与子网计算器
根据 IPv4 地址和前缀生成完整的网络规划，并继续拆分成更小的子网。
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Network bitsHost bits
Total addresses256
Usable hosts254
Click any result to copy it. /31 networks are treated as point-to-point links, where both addresses are usable.
Split this network
Preview smaller subnets inside the current range.
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4 subnets64 addresses each