# Advanced Filters

Advanced filters let you narrow down your Residential Proxy pool by the operating system (OS) or Internet Protocol (IP) version:

* [**Platform (OS)**](https://developers.oxylabs.io/proxies/residential-proxies/advanced-filters/platform-os) – Select proxies that originate from a specific OS (Windows, iOS, etc.)
* [**IP Version**](https://developers.oxylabs.io/proxies/residential-proxies/advanced-filters/ip-version) – Select proxies that use only IPv4 or IPv6.