# Port number reference

> Look up conventional ports for common services.

[Open tool](https://www.toolcabana.com/ca/port-reference) · [Xarxa i web](https://www.toolcabana.com/ca/category/network-and-web)

Tool ID: port-reference. Requested language: ca. Description language: en. Complete guide translation: no; untranslated sections use English.

## Overview (en)

The port number reference looks up the conventional service for 20 well-known ports, returning the service name and whether it uses TCP, UDP or both. Covered ports include FTP, SSH, SMTP, DNS, DHCP, HTTP, POP3, NTP, IMAP, HTTPS, mail submission on 465 and 587, MySQL, PostgreSQL, Redis and 8080. It performs no port scanning.

## Supported tasks (en)

Look up conventional ports for common services.

## Steps (en)

1. Type or paste your source, or load an example.
2. Results update automatically as you edit.
3. Review and copy or download your result. Pause Live results to run manually. Sources or individual settings above 20,000 characters require an explicit run.

## Settings

No additional settings.

## Limitations (en)

Text operations generally accept up to 2,000,000 characters. Individual parsers, generators and formulas apply additional limits shown by their controls.

## Example input

```text
443
```

## Privacy and connections (en)

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

## Questions (en)

### What is port 443 used for?

Port 443 is listed as HTTPS, using TCP and UDP. For comparison, port 80 is listed as plain HTTP over TCP and 8080 as an alternate HTTP port, also over TCP.

### Can this tool check if a port is open?

No. It only returns the conventional service for a port number you type and never connects to or scans any host. A port appearing here does not mean a service is running on it on your network.

### Why does my port number return an error?

Only 20 common ports are included: 20, 21, 22, 25, 53, 67, 68, 80, 110, 123, 143, 443, 465, 587, 993, 995, 3306, 5432, 6379 and 8080. Any other number returns an error that lists them.

### Where is my input processed?

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

### What are the input limits?

Text operations generally accept up to 2,000,000 characters. Individual parsers, generators and formulas apply additional limits shown by their controls.

## Related tools

- [Browser screen size](https://www.toolcabana.com/ca/screen-size)