What Is a Network Port? Proxy Ports Explained
What Is a Network Port?
A network port is a numbered endpoint that identifies a specific process or service on a computer. While an IP address directs traffic to a machine, the port number directs it to the right application on that machine. Ports range from 0 to 65535.
How Ports Work
When your browser connects to a website, it reaches the server's IP address on port 80 (HTTP) or port 443 (HTTPS). The server listens on these ports and responds accordingly. Think of the IP address as a building's street address and the port as the apartment number.
Ports are divided into three ranges:
- Well-known ports (0-1023) — reserved for standard services like HTTP (80), HTTPS (443), and FTP (21).
- Registered ports (1024-49151) — assigned to specific applications and services.
- Dynamic ports (49152-65535) — used temporarily by client applications.
Common Proxy Ports
Proxy servers typically listen on these standard ports:
| Port | Protocol | Usage |
|---|---|---|
| 1080 | SOCKS | Default port for SOCKS4/SOCKS5 proxies |
| 3128 | HTTP | Default Squid proxy port |
| 8080 | HTTP | Common alternative HTTP proxy port |
| 8888 | HTTP | Used by many proxy applications |
| 443 | HTTPS | Encrypted proxy connections |
Why Port Numbers Matter
When configuring a proxy in your application, you need both the IP address and the correct port. Using the wrong port means your connection will fail. Always verify the port when adding proxies from ipproxy.site and test connectivity with our Proxy Checker.
For a broader introduction, see What Is a Proxy.
Need Working Proxies?
Download 2118 validated proxies — HTTP, SOCKS4, and SOCKS5. Updated every 30 minutes.
Download Free Proxy Lists