Port Reference
Complete reference of common TCP and UDP port numbers. Find services for port 80, 443, 22, 3306 and more. Free online po
Common port numbers will appear here...
How to Use Port Reference
- Browse common ports: Scroll through the list of common well-known ports sorted numerically.
- Learn each service: Each port shows its number, protocol (TCP), and associated service name.
- Use as reference: Keep this page handy for firewall configuration, server setup, and network troubleshooting.
About Port Reference
Common Port Reference is a searchable list of commonly used TCP and UDP network ports.
- Well-Known Ports: Provides a quick reference for Port 80 (HTTP), 443 (HTTPS), 21 (FTP), 22 (SSH), and more.
- Service Mapping: If you spot an unknown open port in a firewall, check here to see what service it belongs to.
- No Memorization: You don't need to memorize hundreds of ports; simply search by number or name.
Acts as a pocket guide for system administrators, ethical hackers, and IT security teams.
Frequently Asked Questions
What are network ports?
Network ports are virtual endpoints for communication. Each port number (0-65535) can be associated with a specific service or application.
What is Port 80 used for?
Port 80 is the default port for HTTP (web traffic). Port 443 is for HTTPS (encrypted web traffic). Port 22 is for SSH (secure shell).
How do I find which service uses a port?
Search by port number or service name. The tool lists common associations like 21 (FTP), 25 (SMTP), 53 (DNS), 3306 (MySQL).