Commonly Used TCP & UDP Ports

Here are lists of common ports in use on the internet: Port Number     TCP or UDP               Name Description 20/21              TCP            FTP File Transfer 23                   TCP            telnet Console access to remopte computer 25                   TCP            SMTP Send e-mail 80                   TCP            WWW Web browsing 110                 TCP             POP Receive or check for e-mail 119                 TCP             […]




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List of TCP and UDP port numbers

Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are transport layer protocols used for communication between computers. The Internet Assigned Numbers Authority (IANA) is responsible for assigning port numbers for specific uses. The boxes below indicate a status with the following colors and tags: Official if the application and port combination is in the IANA […]




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