# ASN Targeting Our Residential Proxies support targeting by ASN number which means that you can choose proxies from specific carriers. You have to enter the required ASN number in your request. Below is the example for Free SAS, its ASN number being AS12322: `td-customer-USERNAME-country-fr-asn-AS12322` {% hint style="success" %} [**Click here**](https://vip-upload.thordata.com/files/file/residential-proxies/list_of_ASN.xlsx) to download the complete list of ASN {% endhint %} The Residential Proxy pool is **Rotating**, so there may not always be IPs available for a specific ASN at a given time. If this happens, you'll receive an error response. In this case, try targeting a different ASN {% hint style="info" %} The ASN parameter must be used in conjunction with the country parameter and cannot be specified alone {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.thordata.com/doc/proxies/residential-proxies/location-settings/asn-targeting.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.