> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/products/cn/dai-li/residential-proxies/location-settings/asn-targeting.md).

# ASN 定向

我们的住宅代理支持按 ASN 号码进行定位，这意味着您可以从特定运营商中选择代理。您需要在请求中输入所需的 ASN 号码。下面是 T-Mobile 的示例，其在美国的 ASN 号码为 21928：

`customer-username-ASN-21928-sessid-abcde12345:password`

您可以找到 ASN 号码 [**这里**](https://asnlookup.com/)**.**

{% hint style="warning" %}
我们的 ASN 定位对所有用户都可用，不过某些 ASN 会保留给已通过 KYC 审核的客户，并且可能返回一个 `403 Access denied: restricted ASN` 错误。\
如果您需要访问受限的 ASN，请就 KYC 流程联系客户支持或您的客户经理。
{% endhint %}

住宅代理池本质上是动态的，因此如果在那一刻该特定 ASN 下没有 IP，您将收到一个 `502 Bad Gateway` 响应代码。在这种情况下，您应该尝试另一个 ASN 号码。

{% hint style="info" %}
每个请求只能使用 Country 或 ASN 其中一个参数。如果同时使用两个位置参数，则只会应用 Country 参数。
{% endhint %}


---

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