关于本计算器
IPv4 subnet calculator: network and broadcast addresses, usable host range, subnet and wildcard masks for any CIDR prefix.
IPv4 子网掩码与 CIDR 计算器
快速推算可用主机范围、网络广播地址、反掩码，网络管理员必备。
输入计算参数
CIDR 子网前缀长度/24
/8 (16.7M)/16 (65.5k)/24 (254)/30 (2)
常用网络子网前缀：
计算结果摘要
可用主机 IP 范围
192.168.1.1 – 192.168.1.254
254 个可用主机 (256 个总地址)Class C
网络地址 (Network ID)192.168.1.0
广播地址 (Broadcast IP)192.168.1.255
子网掩码 (Subnet Mask)255.255.255.0
反向掩码 (Wildcard Mask)0.0.0.255
IP 二进制：11000000.10101000.00000001.00110010
掩码二进制：11111111.11111111.11111111.00000000
常见问题
How many hosts are in a /24?
254 usable (256 addresses minus network and broadcast).
What is a wildcard mask?
The inverse of the subnet mask, used in ACLs and OSPF network statements.
What is CIDR notation?
The /N suffix counts the network bits, e.g. /24 means mask 255.255.255.0.