Port Number Lookup
Look up common TCP and UDP port numbers by number or service name, e.g. 22 SSH, 443 HTTPS.
Based on IANA registrations and common de-facto usage. Any service can be configured to listen on a different port.
Which port is which service?
Writing firewall rules, configuring servers, troubleshooting networks or reading port scan results requires knowing which service a port belongs to. The Port Lookup tool lets you search common ports by number or service name.
Categories covered
- Web: 80 (HTTP), 443 (HTTPS), 8080
- Remote access: 22 (SSH), 3389 (RDP), 5900 (VNC)
- Email: 25 (SMTP), 587, 993 (IMAPS), 995 (POP3S)
- Databases: 3306 (MySQL), 5432 (PostgreSQL), 1433 (SQL Server), 6379 (Redis), 27017 (MongoDB)
- VPN and developer tools
The list is based on IANA registrations and common practice.
How to use Port Number Lookup
- Type a port number or service name.
- See matching ports and protocols.
- Read the service description.
- Use the information in your firewall or configuration work.
Why use this tool?
A fast, searchable and simple port reference for sysadmins and developers.
FAQ
Does a port number guarantee which service is running?
No. Ports are conventions; any service can listen on any port, so verify on the server.
What's the difference between TCP and UDP?
TCP is connection-oriented and reliable; UDP is faster but doesn't guarantee delivery. DNS and games use UDP.
What are well-known ports?
Ports 0–1023 are well-known ports, usually reserved for system services.
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