An ISP proxy, also called a static residential proxy, is a proxy whose IP address is registered to a real internet service provider (ISP) but hosted on data center servers instead of home devices. Websites see an ISP-registered IP, while you get datacenter-level speed and an address that typically stays the same across sessions.

ISP proxies are provisioned by leasing IP blocks directly from internet service providers and hosting them on dedicated servers rather than routing through actual consumer devices. This avoids the main weakness of true residential proxies (inconsistent speed, dependent on someone's home connection) while keeping the ISP-registered IP that helps traffic pass as legitimate. They're typically static (the same IP persists across sessions) rather than rotating, which makes them well suited to tasks that require a consistent identity over time, like managing social media or marketplace accounts.

Because ISP proxies combine a real ISP-registered IP with datacenter-level hosting, they're often positioned between standard residential and datacenter offerings, depending on what a provider makes available.

Common ISP Proxy Use Cases

Besides account management, ISP proxies are commonly used for:

  • Logged-in (authenticated) scraping and long crawls that need a stable IP
  • Ad verification
  • SEO monitoring
  • Accessing geo-restricted content
  • Limited-edition purchases, such as sneaker drops

Why Websites Treat ISP Proxies as Residential (ASN)

Every IP address belongs to an Autonomous System Number (ASN) that identifies who owns it. An ISP proxy's IP is registered under a consumer ISP's ASN, not a hosting company's. A site that looks up the ASN therefore sees an ISP record and treats the request as residential traffic. One limitation: ISP proxy IPs come from fewer subnets, so a block on one IP range can take out many at once.