The Most Popular TCP and UDP Port NumbersThis is your IP address. Click below to learn more about your location with GeoIP data. For example, port 80 is used by web servers. Port Numbers to These are ports that an organization, such as application developers, can register with IAMA to be used a particular service. These should be treated as semi-reserved. Port Numbers to These are port numbers used by client programs, such as a web browser. When you visit a web site, your web browser will assign that session a port number from with this range.
List of Well-Known TCP Port Numbers
Similarly many of the official assignments refer to protocols that were never or are no longer in common use. This article lists port numbers and their associated protocols that have experienced significant uptake. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports. They are assigned by IANA for specific service upon application by a requesting entity. From Wikipedia, the free encyclopedia. Wikimedia list article. This article contains one or more incomplete lists which may never be able to satisfy particular standards for completeness.
They are used by protocols in the upper layers of the OSI model. Port numbers are used to determine what protocol incoming traffic should be directed to. Ports allow a single host with a single IP address to run network services. Each port number identifies a distinct service, and each host can have ports per IP address. ICMP is a network layer protocol. This site uses Akismet to reduce spam. Learn how your comment data is processed.
List of Well-Known Ports
Most TCP ports are general-purpose channels that can be called into service as needed but otherwise sit idle. Some lower-numbered ports, however, are dedicated to specific applications. While many TCP ports belong to applications that no longer exist, certain ones are very popular. TCP does not actually use port 0 for network communication, but this port is well-known to network programmers. TCP socket programs use port 0 by convention to request an available port be chosen and allocated by the operating system. This saves a programmer from having to pick "hardcode" a port number that might not work well for the situation. The server listens for FTP commands arriving at this port and responds accordingly.
Below, we take a look at these protocols, provides a basic description of their function, and lists the port numbers that they are commonly associated with. FTP is one of the most commonly used file transfer protocols on the Internet and within private networks. An FTP server can easily be set up with little networking knowledge and provides the ability to easily relocate files from one system to another. SSH is the primary method used to manage network devices securely at the command level. It is typically used as a secure alternative to Telnet which does not support secure connections.