> For the complete documentation index, see [llms.txt](https://docs.bestip.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bestip.one/term/asn.md).

# ASN

### ASN是什么？

ASN代表**Autonomous System Number**，即**自治系统编号**。它是一个由互联网号码分配机构 (IANA) 分配给互联网服务提供商 (ISP) 或其他网络运营商的唯一 16 位或 32 位数字。

每个自治系统都维护自己的路由策略，并与其他自治系统交换路由信息。这使得互联网上的数据包能够在不同的网络之间进行路由。

在本程序中使用ASN来区分不同的IP集合


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