ronutz

CIDR / 子网计算器

将任意 IPv4 CIDR 块拆解为网络地址和广播地址、可用主机范围、主机数量和子网掩码，并查看它落在哪个 IANA 特殊用途地址范围内。其他模式可将父块划分为可变长度子网（VLSM）、将前缀汇总为超网，并找出重叠和空隙。完全在你的浏览器中运行。

网络
Documentation

CIDR 计算器

分析单个 IPv4 CIDR 块：网络、广播、掩码、主机范围，以及它所在或与之重叠的特殊用途范围。

本地运行，不向任何服务器发送任何内容。

API endpointGEThttps://ronutz.com/api/v1/cidrDocumented, not served. Opens the specification.

What this page needs

Runs in your browserJavaScript + CSSAPI-ready

This tool computes entirely on your device, so nothing you type is sent anywhere. That local computation needs JavaScript; CSS is used for layout and theming.

This tool is built to also work over an HTTP API. Processing is currently off, so the API is documented but not served; when it is switched on, you will be able to call it without a browser.

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