What is a residential proxy?

A residential proxy routes your request through a real home internet connection. The website you are visiting sees an address that belongs to Comcast or Deutsche Telekom or Airtel — an address indistinguishable from the ones its actual customers use, because it is one.

That is the entire value proposition, and it only matters because of what the alternative looks like. Datacenter addresses come in contiguous blocks registered to hosting companies. Anyone can look up which block an address belongs to, and a great many websites do exactly that, because a connection from an AWS range is far more likely to be automated than a connection from a residential DSL line.

Where the addresses come from

This is the part of the industry that deserves scrutiny, and the part most providers describe vaguely. A residential proxy pool is made of consenting participants running a client on their device. The honest versions of this pay people — in cash, in ad-free app usage, in VPN credit — and disclose plainly what the software does. The dishonest versions bundle the client inside a free app's installer, bury the disclosure in paragraph forty of a EULA, and hope nobody reads it.

The distinction is not academic. A pool built without informed consent is one regulatory action away from disappearing, and a supplier whose pool disappears takes your pipeline with it. Ask any provider you evaluate how peers are recruited, what they are told, and how they opt out. A provider that cannot answer crisply is telling you something.

How rotation works

You do not connect to a specific home connection. You connect to a gateway, and the gateway picks an exit for you from the pool of currently available peers matching your targeting. By default it picks a different one for every request.

# two requests, two different exit addresses
curl -x res.wproxy.io:8000 -U "wp-acc4821:pass" https://ipinfo.io/ip
curl -x res.wproxy.io:8000 -U "wp-acc4821:pass" https://ipinfo.io/ip

Rotation is what makes the pool useful at scale. Ten thousand requests from ten thousand addresses is normal internet traffic; ten thousand requests from one address is a denial of service attempt as far as most rate limiters are concerned.

When you should not use one

Residential bandwidth costs roughly six times what datacenter bandwidth costs, because you are paying for access to a scarce and consensually maintained resource rather than for rack space. If your target does not inspect network origin — and plenty do not — you are burning money for no gain.

The trade-offs, honestly

Residential is slower because the last hop is a home connection with a home connection's upstream. That is not a defect you can engineer away; it is the thing you are buying.