What Is a Proxy Address and How to Find It

A proxy address is the endpoint your traffic is sent through. It looks like any other network address, but it is a common source of confusion because two different things get called "the proxy address": the server you connect to, and the IP a website sees.

They are usually not the same.

The parts of a proxy address

A complete proxy address has three pieces:

• Host. A domain name or IP for the proxy server, such as proxy.lightningbytes.com.
• Port. The listening port for the protocol, for example the standard HTTP proxy port or a dedicated SOCKS5 port.
• Credentials. A username and password, sent either in an authorization header or embedded in the URL.

In a URL form it looks like:

http://user:pass@proxy.example.com:8080

The http:// prefix describes how you talk to the proxy, not the scheme of the destination. You can reach HTTPS sites through an HTTP proxy using the CONNECT method, which we explain in HTTP vs HTTPS Proxies.

SOCKS5 uses a different port and, in some clients, a different credential mechanism. The trade-offs are in SOCKS5 vs HTTP Proxies.

Proxy address versus exit IP

This is the distinction that trips people up.

The proxy address is where your client connects. It is stable, and it is the same for every request you send through it.

The exit IP is what the destination sees. In a rotating pool, the exit IP can change per request even though the proxy address did not move. Even in a static setup, the exit IP may differ from the proxy address, because the gateway forwards your request from a different address than the one you connected to.

So "my proxy IP changed" and "my proxy address changed" mean different things. When someone says their IP changed, they usually mean the exit IP, and that is a feature rather than a problem.

Finding the proxy configured on a device

If you are debugging an existing setup, the configured proxy is stored per application or per system.

• Windows. Settings, Network and Internet, Proxy. Look for a manual proxy configuration and any exceptions list.
• macOS. System Settings, Network, the active connection, Details, Proxies. Web (HTTP) and Secure Web (HTTPS) entries are separate.
• Linux and servers. Check environment variables, commonly HTTP_PROXY, HTTPS_PROXY and NO_PROXY, plus any per-application configuration.
• Browsers. Many follow the system setting, but some set their own. Firefox, for example, has an independent proxy configuration, so check it separately from the operating system.
• Command line tools. curl and many libraries read environment variables by default, so a stray HTTP_PROXY can silently route traffic you did not intend to proxy.

Verifying what a destination sees

Configuration tells you where requests go. It does not tell you where they come out. To confirm the exit IP and its location:

1. Fetch a page that echoes your address through the proxy.
2. Look up that address to see its country and network.

The LightningBytes proxy checker does both in one step for any HTTP or SOCKS5 endpoint, reporting the exit IP and the latency the proxy adds. The IP lookup tool gives the country, city and network for any address, which is how you confirm a country-targeted endpoint is actually exiting there.

For browser sessions, the WebRTC leak test checks a different failure mode entirely: whether WebRTC is exposing your real address around the proxy.

Common mistakes

• Assuming the proxy address is the exit IP. They usually differ, especially with rotation.
• Forgetting the port. A correct host with the wrong port produces a connection error that looks like the proxy is down.
• Embedding credentials in shared code. Use environment variables, not committed strings, which we cover in Proxy Authentication.
• Leaving a stale environment variable set. A leftover HTTP_PROXY will route your traffic and cause very confusing failures.

LightningBytes endpoints are issued per sub-user with the host, port and credentials shown in the dashboard, and the FAQ covers the setup questions we see most. Current connection details are on the residential and mobile pages.