List of TCP and UDP port numbers/etc/services, a service name database file on Unix- like operating systems.[1][2][3][4]This is a list of notable port numbers used by protocols of the transport layer of the Internet protocol suite for the establishment of host- to- host connectivity. Originally, port numbers were used by the Network Control Program (NCP) in the ARPANET for which two ports were required for half- duplex transmission. Later, the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full- duplex, bidirectional traffic. The even- numbered ports were not used, and this resulted in some even numbers in the well- known port number range being unassigned. The Stream Control Transmission Protocol (SCTP) and the Datagram Congestion Control Protocol (DCCP) also use port numbers. 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.[5] However, many unofficial uses of both well- known and registered port numbers occur in practice.
Current File (2) 2014/10/28 2014/11/12 John Wiley & Sons Information Technology & Software Development Adobe Creative Team. Adobe Press Digital Media. 9781600448638 1600448631 Que Se Puede Hacer Con el Agua?, Marcia S Freeman 9783639060874 3639060873 Fruit and Vegetable Consumption and Risk of Epithelial Ovarian. 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 legend[edit] Official: Port is registered with IANA for the application.[5] Unofficial: Port is not registered with IANA for the application. Multiple use: Multiple applications are known to use this port. Well- known ports[edit]The port numbers in the range from 0 to 1. 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.[1]Well- known ports. Port. TCPUDPDescription. IANA status. 0N/AN/AIn programming APIs (not in communication between hosts), requests a system- allocated (dynamic) port[7]N/A0. Reserved. Reserved. Reserved. Official. TCPAssigned. TCP Port Service Multiplexer (TCPMUX). Historic. Both TCP and UDP have been assigned to TCPMUX by IANA,[5] but by design only TCP is specified.[8]Official. Reserved. Reserved. Unassigned. Official. TCPUDPRemote job entry. Official. 6Reserved. Reserved. Unassigned. Official. 7TCPUDPEcho Protocol[9][1. Official. 8Reserved. Reserved. Unassigned. Official. 9UDPDiscard Protocol[1. Official. 9UDPWake- on- LAN[1. Unofficial. 10. Reserved. Reserved. Unassigned. Official. 11. TCPUDPActive Users (systat service)[1. Official. 12. Reserved. Reserved. Unassigned. Official. 13. TCPUDPDaytime Protocol[1. Official. 14. Reserved. Reserved. Unassigned. Official. 15. TCPUDPPreviously netstat service[5][1. Unofficial. 16. Reserved. Reserved. Unassigned. Official. 17. TCPUDPQuote of the Day (QOTD)[1. Official. 18. TCPUDPMessage Send Protocol[1. Official. 19. TCPUDPCharacter Generator Protocol (CHARGEN)[2. Official. 20. Assigned. File Transfer Protocol (FTP) data transfer[1. Official. 21. Assigned. File Transfer Protocol (FTP) control (command)[1. Official. 22. UDPSecure Shell (SSH),[1. Official. 23. TCPAssigned. Telnet protocol—unencrypted text communications[1. Official. 25. TCPAssigned. Simple Mail Transfer Protocol (SMTP),[1. Official. 26. Reserved. Reserved. Unassigned. Official. 37. TCPUDPTime Protocol[2. Official. 38. TCPUDPRoute Access Protocol (RAP)[2. Official. 39. TCPUDPResource Location Protocol (RLP)[2. Official. 40. Reserved. Reserved. Unassigned. Official. 42. TCPUDPHost Name Server Protocol[2. Official. 43. TCPUDPWHOIS protocol[2. Official. 49. TCPUDPTACACS+ Login Host protocol[3. Official. 50. TCPUDPRemote Mail Checking Protocol[3. Official. 51. Reserved. Official. 51. TCPUDPPreviously Interface Message Processor logical address management[citation needed]Unofficial. TCPUDPXerox Network Systems (XNS) Time Protocol[importance?]Official. TCPUDPDomain Name System (DNS)[1. Official. 54. TCPUDPXerox Network Systems (XNS) clearinghouse[importance?]Official. TCPUDPXerox Network Systems (XNS) authentication[importance?]Official. TCPUDPAny private terminal access[further explanation needed]Official. TCPUDPXerox Network Systems (XNS) Mail[importance?]Official. Assigned. UDPBootstrap Protocol (BOOTP) server; [1. Dynamic Host Configuration Protocol (DHCP)Official. Assigned. UDPBootstrap Protocol (BOOTP) client; [1. Dynamic Host Configuration Protocol (DHCP)Official. Assigned. UDPTrivial File Transfer Protocol (TFTP)[1. Official. 70. TCPUDPGopher protocol[3. Official. 71–7. 4TCPUDPNETRJS protocol[3. Official. 75. TCPUDPAny private dial out service[further explanation needed]Official. TCPUDPAny private Remote job entry[further explanation needed]Official. TCPAssigned. Finger protocol[1. Official. 80. UDP[4. Hypertext Transfer Protocol (HTTP)[1. Official. 80. UDPQUIC (from Chromium) for HTTP[citation needed]Unofficial. N/AN/AUnassigned. Official. 81. TCPTor. Parkonion routing[verification needed]Unofficial. UDPTor. Park control[verification needed]Unofficial. Any private terminal link[further explanation needed]Official. TCPAssigned. Kerberos[1. Official. 90. TCPUDPdnsix (Do. D Network Security for Information Exchange) Securit [sic?] Attribute Token Map[importance?]Official. TCPUDPPoint. Cast (dotcom)[5][third- party source needed]Unofficial. TCPWIP message protocol[verification needed]Unofficial. N/AN/AUnassigned (with known unauthorized use[further explanation needed])[5]Official. TCPUDPNIChost name. Official. 10. 2TCPUDPISO Transport Service Access Point (TSAP) Class 0 protocol; [4. Official. 10. 4TCPUDPDigital Imaging and Communications in Medicine (DICOM; also port 1. Official. 10. 5TCPUDPCCSO Nameserver[5. Official. 10. 7TCPUDPRemote User Telnet Service (RTelnet)[5. Official. 10. 8TCPUDPIBM Systems Network Architecture (SNA) gateway access server. Official. 10. 9TCPUDPPost Office Protocol, version 2 (POP2)[5. Official. 11. 0TCPAssigned. Post Office Protocol, version 3 (POP3)[1. Official. 11. 1TCPUDPOpen Network Computing Remote Procedure Call (ONC RPC, sometimes referred to as Sun RPC)Official. TCPVirtual Router Redundancy Protocol (VRRP)[5. Unofficial. 11. 3TCPIdent, authentication service/identification protocol,[1. IRC servers to identify users. Official. 11. 3TCPAssigned. Authentication Service (auth), the predecessor to identification protocol. Used to determine a user's identity of a particular TCP connection.[5. Official. 11. 4N/AN/AUnassigned (deprecated since June 2. Official. 11. 5TCPUDPSimple File Transfer Protocol[1. Official. 11. 7TCPUDPUUCP Mapping Project (path service)[citation needed]Official. TCPUDPStructured Query Language (SQL) Services[jargon]Official. TCPAssigned. Network News Transfer Protocol (NNTP),[1. Official. 12. 3Assigned. UDPNetwork Time Protocol (NTP), used for time synchronization[1. Official. 12. 6TCPUDPFormerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development. Official. 13. 5TCPUDPDCEendpoint resolution. Official. 13. 5TCPUDPMicrosoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[6. DHCP server, DNS server and WINS. Also used by DCOMOfficial. Assigned. UDPNet. BIOS Name Service, used for name registration and resolution[6. Official. 13. 8TCPUDPNet. BIOS Datagram Service[1. Official. 13. 9TCPAssigned. Net. BIOS Session Service[6. Official. 14. 3TCPAssigned. Internet Message Access Protocol (IMAP),[1. Official. 15. 2TCPUDPBackground File Transfer Program (BFTP)[6. Official. 15. 3TCPUDPSimple Gateway Monitoring Protocol (SGMP), a protocol for remote inspection and alteration of gateway management information[6. Official. 15. 6TCPUDPStructured Query Language (SQL) Service[jargon]Official. TCPUDPDistributed Mail System Protocol (DMSP, sometimes referred to as Pcmail)[6. Official. 16. 1Assigned. UDPSimple Network Management Protocol (SNMP)[6. Official. 16. 2TCPUDPSimple Network Management Protocol Trap (SNMPTRAP)[6. Official. 17. 0TCPUDPPrint server[verification needed]Official. TCPUDPX Display Manager Control Protocol (XDMCP), used for remote logins to an X Display Manager server[7. Official. 17. 9UDPBorder Gateway Protocol (BGP),[7. AS) on the Internet. Official. 18. 0TCPUDPRelational Interface System (ris) Intergraph[citation needed]Official. TCPUDPInternet Relay Chat (IRC)[7. Official. 19. 9TCPUDPSNMP multiplexing protocol (SMUX)[7. Official. 20. 1TCPUDPApple. 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