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Port Number List PDF Download

A port number acts as the address for each application or process that chats over a network or the Internet. It’s like the app’s unique ID on a computer. The OS can assign it automatically, users can set it manually, or it’s preset for popular apps.


-Port numbers fall into three groups: well-known, registered, and dynamic or private. The registered ports range from 1024 to 49151. IANA keeps the official list of these ports. The dynamic or private ports range from 49152 to 65535.

Port numbers for

  1. FTP (File Transfer Protocol) are like this:
  • Port 20: Handles data transfer
  • Port 21: Manages control (commands)

2.For SSH (Secure Shell), it goes like this:

  • Port 22: It’s all about secure logins