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Network Port Encyclopedia

A searchable network port reference guide covering common and obscure port numbers, their associated services, and protocols. Perfect for system administrators troubleshooting firewall rules, developers configuring applications, or security professionals conducting port scans. Search by port number (e.g., 3389), service name (e.g., RDP), or protocol to instantly see what each port does. Filter by common ports, well-known ports (0-1023), or registered ports (1024-49151) to find exactly what you need. Use Network Ports when you need answers fast during debugging, reviews, or incident triage. Paste your input, validate the output, then copy results into tickets or docs in seconds. Most processing runs in your browser, so you can test safely without unnecessary data exposure.

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How to Use This Tool

  1. Search Ports - Type a port number, service name, or protocol in the search box
  2. Filter Categories - Click All, Common, Well-Known (0-1023), or Registered (1024-49151) to narrow results
  3. Review Details - See port number, service name, protocol (TCP/UDP), and description for each entry

Why This Method?

Network ports are 16-bit numbers (0-65535) that act as endpoints for network connections. The Internet Assigned Numbers Authority (IANA) divides these into three ranges: Well-Known Ports (0-1023) for system services like HTTP (80) and HTTPS (443), Registered Ports (1024-49151) for user applications like MySQL (3306), and Dynamic Ports (49152-65535) for temporary connections.

Common ports you'll encounter include 22 (SSH) for secure remote access, 3389 (RDP) for Windows Remote Desktop, 8080 (HTTP Alt) for development web servers, and 27017 (MongoDB) for database connections. Understanding these is essential for configuring firewalls, debugging network issues, and securing services.

Both TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) can use the same port numbers but serve different purposes. TCP ports like HTTP (80) require connection handshakes for reliable data transfer, while UDP ports like DNS (53) prioritize speed over reliability for time-sensitive applications.