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This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex, bidirectional traffic. They usually use port numbers that match the services of the corresponding TCP or UDP implementation, if they exist. The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses. However, many unofficial uses of both well-known and registered port numbers occur in practice. 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. Table legendWell-known portsThe port numbers in the range from 0 to 1023 (0 to 210 − 1) are the well-known ports or system ports. They are used by system processes that provide widely used types of network services. 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. Registered portsThe range of port numbers from 1024 to 49151 (210 to 214 + 215 − 1) are the registered ports. They are assigned by IANA for specific service upon application by a requesting entity. On most systems, registered ports can be used without superuser privileges. Dynamic, private or ephemeral portsThe range 49152–65535 (215 + 214 to 216 − 1) contains dynamic or private ports that cannot be registered with IANA. This range is used for private or customized services, for temporary purposes, and for automatic allocation of ephemeral ports. NoteSee alsoPort (computer networking) Internet protocol suite List of IP numbers Lists of network protocols Comparison of file transfer protocols References and notesFurther readingReynolds, Joyce; Postel, Jon (October 1994). Assigned Numbers. IETF. doi:10.17487/RFC1700. RFC 1700. External links"Service Name and Transport Protocol Port Number Registry". IANA.org. Internet Assigned Numbers Authority. TCP/UDP port numbers listThis is a list of TCP and UDP port numbers used by protocols for the operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex, bidirectional traffic. They usually use port numbers that match the services of the corresponding TCP or UDP implementation, if they exist. The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses. However, many unofficial uses of both well-known and registered port numbers occur in practice. 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. Legend of TCP and UDP protocol table cells for port numbers:
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. Ports list
Back to List What is the port number for UDP?The most common UDP packets—DNS registrations and name-resolution queries—are sent to port 53. In contrast, TCP ports support only connection-oriented protocols. A connection-oriented protocol requires that network endpoints establish a channel between them before they transmit messages.
What are the wellWell-Known Ports. Port numbers can run from 0 to 65353. Port numbers from 0 to 1023 are reserved for common TCP/IP applications and are called well-known ports.
Is port 23 TCP or UDP?
What are the port numbers for DHCP TCP IP UDP HTTP https?Table 1 Common TCP/IP Protocols and Ports. |