IP Address Calculator
Calculate CIDR, subnet masks, IP ranges, and more.
e.g., 192.168.1.0/24, 10.0.0.0/8, 172.16.0.0/12
Please enter a valid CIDR address (e.g., 192.168.1.0/24)
Why Choose Our Tools?：
- e.g., 192.168.1.0/24, 10.0.0.0/8, 172.16.0.0/12
- Network Address, Broadcast Address, Subnet Mask, Usable Hosts：
Network Address：Network Address
Broadcast Address：Broadcast Address
Subnet Mask：Subnet Mask
Usable Hosts：Usable Hosts
Total Hosts Each tool is carefully optimized to provide the fastest and most convenient experience.：
Total Hosts
该网段理论上可以包含的全部 IP 地址数量
2^(32-CIDR)Usable Hosts
实际可分配给设备使用的 IP 地址数量
保留网络地址和广播地址
Total Hosts Each tool is carefully optimized to provide the fastest and most convenient experience.： /24 网段有 256 个总地址，但第一个地址（网络地址）用于标识网络，最后一个地址（广播地址）用于网络广播，因此实际可用主机为 254 个。
Subnet Mask Total Hosts Each tool is carefully optimized to provide the fastest and most convenient experience.：
| CIDR | Subnet Mask | Usable Hosts |
|---|---|---|
| /24 | 255.255.255.0 | 254 |
| /16 | 255.255.0.0 | 65,534 |
| /8 | 255.0.0.0 | 16,777,214 |
| /28 | 255.255.255.240 | 14 |