🧮 子网掩码计算器IPv4 Subnet Calculator (CIDR)
输入 IP/CIDR（如 192.168.1.10/24），计算网络地址、广播地址、子网掩码、可用主机范围和数量。Calculate network, broadcast, mask, wildcard and usable host range from IP/CIDR.
使用说明与常见问题How-to & FAQ
「子网掩码计算器」是什么？What is the IPv4 Subnet Calculator (CIDR)?
输入 IP/CIDR（如 192.168.1.10/24），计算网络地址、广播地址、子网掩码、可用主机范围和数量。Calculate network, broadcast, mask, wildcard and usable host range from IP/CIDR.
如何使用「子网掩码计算器」？How do I use the IPv4 Subnet Calculator (CIDR)?
在「子网掩码计算器」中，填写「IP/CIDR」、「或子网掩码」等参数，结果会随输入实时计算并显示在下方。In the IPv4 Subnet Calculator (CIDR): Fill in "IP/CIDR", "or subnet mask"; results are recalculated instantly as you type.
需要联网吗？Does it need an internet connection?
不需要。「子网掩码计算器」的解析和计算都在浏览器本地完成，不会向任何服务器发送请求。No. The IPv4 Subnet Calculator (CIDR) parses and calculates entirely in your browser and sends no network requests.
「子网掩码计算器」免费吗？需要注册吗？Is the IPv4 Subnet Calculator (CIDR) free? Do I need an account?
「子网掩码计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The IPv4 Subnet Calculator (CIDR) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.