Common Network Ports Reference

About this tool

A searchable list of common network port numbers and their services. Filter by port or service name.

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Type a port number like 22 or a service name like ssh into the search field.
2. Review the matching TCP or UDP entries in the list to see the related service.
3. Use the filter to narrow results when the list is long or when a port has several common uses.
4. Open the matching entry and read the plain-language explanation for that port.

Step by step, what happens

1. The tool takes your search text and checks both port numbers and service names.
2. It filters the reference list to only the entries that match what you typed.
3. For each match, it shows the common port number, the service name, and whether it is typically TCP or UDP.
4. If a port has more than one known use, the tool keeps the result focused on the common reference entry so you can identify it quickly.

Worked example

A developer sees an open SSH port in a firewall rule and wants to confirm what service it usually maps to.

Input: 22

1. Enter 22 in the search field.
2. The tool filters the reference list to the entry for port 22.
3. You see that port 22 is commonly used for SSH.

Tips and common mistakes

• Search by either the number or the service name, whichever you already know.
• Remember that the tool is a reference, so it shows common port usage and not a live scan of your machine.
• If a result looks unfamiliar, check whether you searched for TCP or UDP and compare the service name carefully.
• Do not assume every server uses the same port for a service, because administrators can change defaults.

Frequently asked questions