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Port Number Lookup (Common Ports)

What runs on port 22, 443, 3389…? Search common TCP/UDP port numbers and services.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: A port is like a door number on a computer: the IP finds the building, the port finds the right service inside.

How to use it (step by step)

  1. 1Fill in the boxes: “Port number or service name”. Example numbers are already there so you can see how it works; replace them with yours.
  2. 2The result updates instantly as you type (on a phone it is below the boxes).
  3. 3The bold line is the main answer. Tap Copy next to any value to copy it.

Words to know

Port
A numbered door on a computer. The IP finds the device; the port finds the service (443 = secure websites, 22 = SSH).
IP address
The address of a device on the internet, like a house number for your connection. Websites need it to send pages back to you.
Array / list
An ordered collection of items, like ["apple", "banana"]. Every programming language has one.

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