A proxy pool is the total collection of IP addresses that a proxy provider maintains and makes available for routing your traffic. When you connect to a rotating proxy service, your requests exit through IPs drawn from this pool. The size, diversity, and quality of the pool directly affect how well the proxies perform.
Proxy providers source IPs from various channels: residential peers, ISP partnerships, and mobile networks. These IPs are aggregated into a pool and made available through a backconnect gateway. When you send a request, the gateway selects an IP from the pool based on your configuration. You might get a random IP, an IP from a specific country, or a sticky IP that persists across requests. The pool is continuously maintained. Dead or banned IPs get cycled out, and fresh ones get added.
A larger pool means better IP diversity. If a target website blocks one IP, there are millions more available. Small pools get exhausted quickly, especially when multiple users share them. With a pool of 85M+ residential IPs, ScaleProxy provides broad geographic coverage across 195+ countries and enough diversity that even aggressive anti-bot measures struggle to block a meaningful percentage of available addresses.
Pool quality matters as much as pool size. An 85-million-IP pool of real residential addresses outperforms a 200-million-IP pool filled with datacenter IPs pretending to be residential.
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