Common port numbers
A port number tells the operating system which program should receive network traffic. Well-known services have conventional default ports, which you can usually change in their configuration.
Port 5432
Well-known and commonly used ports. Many can be changed.
| Port | Used for |
|---|---|
5432 | PostgreSQL |
How to use it
- Enter a port number, or a service name.
- Read what normally uses it.
- Check your firewall and config if it behaves differently.
This tool is also built into Zest search, so you can type your question into the search box and get the same answer above the results.
Common questions
- What is the default port for HTTPS?
- 443. Plain HTTP uses 80.
- Which port does SSH use?
- 22 by default. Many people move it to a higher port to reduce automated login attempts, though key-based login is the stronger fix.