0

TCP

Programming technique for specifying system-allocated (dynamic) ports^[3][4]

Unofficial

0

UDP

Reserved

Official

1

TCP

UDP

TCP Port Service Multiplexer (TCPMUX)

Official

2

TCP

UDP

CompressNET^[5] Management Utility^[6]

Official

3

TCP

UDP

CompressNET^[5] Compression Process^[7]}

Official

4

TCP

UDP

Unassigned

Official

5

TCP

UDP

Remote Job Entry

Official

6

TCP

UDP

Unassigned

Official

7

TCP

UDP

Echo Protocol

Official

8

TCP

UDP

Unassigned

Official

9

TCP

UDP

Discard Protocol

Official

9

UDP

Wake-on-LAN

Unofficial

10

TCP

UDP

Unassigned

Official

11

TCP

UDP

Active Users (systat^{[disambiguation needed]} service)^[8][9]

Official

12

TCP

UDP

Unassigned

Official

13

TCP

UDP

Daytime Protocol (RFC 867)

Official

14

TCP

UDP

Unassigned

Official

15

TCP

UDP

Previously netstat service^[8]

Unofficial

16

TCP

UDP

Unassigned

Official

17

TCP

UDP

Quote of the Day

Official

18

TCP

UDP

Message Send Protocol

Official

19

TCP

UDP

Character Generator Protocol (CHARGEN)

Official

20

TCP

UDP

FTP data transfer

Official

21

TCP, SCTP

UDP

FTP control (command)

Official

22

TCP, SCTP

UDP

Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding

Official

23

TCP

UDP

Telnet protocol—unencrypted text communications

Official

24

TCP

UDP

Priv-mail : any private mail system.

Official

25

TCP

UDP

Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers

Official

26

TCP

UDP

Unassigned

Official

27

TCP

UDP

NSW User System FE

Official

29

TCP

UDP

MSG ICP

Official

33

TCP

UDP

Display Support Protocol

Official

35

TCP

UDP

Any private printer server protocol

Official

37

TCP

UDP

TIME protocol

Official

39

TCP

UDP

Resource Location Protocol^[10] (RLP)—used for determining the location of higher level services from hosts on a network

Official

40

TCP

UDP

Unassigned

Official

42

TCP

UDP

ARPA Host Name Server Protocol

Official

42

TCP

UDP

Windows Internet Name Service

Unofficial

43

TCP

UDP

WHOIS protocol

Official

47

TCP

UDP

NI FTP

Official

49

TCP

UDP

TACACS Login Host protocol

Official

50

TCP

UDP

Remote Mail Checking Protocol^[11]

Official

51

TCP

UDP

IMP Logical Address Maintenance

Official

52

TCP

UDP

XNS (Xerox Network Systems) Time Protocol

Official

53

TCP

UDP

Domain Name System (DNS)

Official

54

TCP

UDP

XNS (Xerox Network Systems) Clearinghouse

Official

55

TCP

UDP

ISI Graphics Language (ISI-GL)

Official

56

TCP

UDP

XNS (Xerox Network Systems) Authentication

Official

56

TCP

UDP

Route Access Protocol (RAP)^[12]

Unofficial

57

TCP

UDP

any private terminal access

Official

58

TCP

UDP

XNS (Xerox Network Systems) Mail

Official

64

TCP

UDP

CI (Travelport) (formerly Covia) Comms Integrator

Official

67

TCP

UDP

Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP)

Official

68

TCP

UDP

Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP)

Official

69

TCP

UDP

Trivial File Transfer Protocol (TFTP)

Official

70

TCP

UDP

Gopher protocol

Official

71

TCP

UDP

NETRJS protocol

Official

72

TCP

UDP

NETRJS protocol

Official

73

TCP

UDP

NETRJS protocol

Official

74

TCP

UDP

NETRJS protocol

Official

77

TCP

UDP

Any private Remote Job Entry

Official

79

TCP

UDP

Finger protocol

Official

80

TCP, SCTP

UDP

Hypertext Transfer Protocol (HTTP)^[13]

Official

80

UDP

QUIC (from Chromium) for HTTP

Unofficial

81

TCP

Torpark—Onion routing

Unofficial

82

UDP

Torpark—Control

Unofficial

88

TCP

UDP

Kerberos—authentication system

Official

90

TCP

UDP

dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map

Official

90

TCP

UDP

PointCast (dotcom)

Unofficial

99

TCP

WIP Message protocol

Unofficial

100

UDP

CyberGate RAT protocol

Unofficial

101

TCP

NIC host name

Official

102

TCP

ISO-TSAP (Transport Service Access Point) Class 0 protocol;^[14] also used by Digital Equipment Corporation DECnet (Phase V+) over TCP/IP

Official

104

TCP

UDP

ACR/NEMA Digital Imaging and Communications in Medicine (DICOM)

Official

105

TCP

UDP

CCSO Nameserver Protocol (Qi/Ph)

Official

107

TCP

Remote TELNET Service^[15] protocol

Official

108

TCP

UDP

SNA Gateway Access Server^[1]

Official

109

TCP

Post Office Protocol v2 (POP2)

Official

110

TCP

Post Office Protocol v3 (POP3)

Official

111

TCP

UDP

ONC RPC (Sun RPC)

Official

113

TCP

Ident—Authentication Service/Identification Protocol,^[16] used by IRC servers to identify users

Official

113

UDP

Authentication Service^[16] (auth)

Official

115

TCP

Simple File Transfer Protocol

Official

117

STD

UUCP Path Service

Official

118

TCP

UDP

SQL (Structured Query Language) Services

Official

119

TCP

Network News Transfer Protocol (NNTP)—retrieval of newsgroup messages

Official

123

TCP

UDP

Network Time Protocol (NTP)—used for time synchronization

Official

126

TCP

UDP

Formerly 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

135

TCP

UDP

DCE endpoint resolution

Official

135

TCP

UDP

Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,^[17] used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM

Unofficial

137

TCP

UDP

NetBIOS NetBIOS Name Service

Official

138

TCP

UDP

NetBIOS NetBIOS Datagram Service

Official

139

TCP

UDP

NetBIOS NetBIOS Session Service

Official

143

TCP

Internet Message Access Protocol (IMAP)—management of email messages

Official

152

TCP

UDP

Background File Transfer Program (BFTP)^[18]

Official

153

TCP

UDP

SGMP, Simple Gateway Monitoring Protocol

Official

156

TCP

UDP

SQL Service

Official

158

TCP

UDP

DMSP, Distributed Mail Service Protocol^[19]

Unofficial

161

UDP

Simple Network Management Protocol (SNMP)

Official

162

TCP

UDP

Simple Network Management Protocol Trap (SNMPTRAP)^[20]

Official

170

TCP

Print-srv, Network PostScript

Official

175

TCP

VMNET (IBM z/VM, z/OS & z/VSE—Network Job Entry (NJE))

Official

177

TCP

UDP

X Display Manager Control Protocol (XDMCP)

Official

179

TCP

BGP (Border Gateway Protocol)

Official

194

TCP

UDP

Internet Relay Chat (IRC)

Official

199

TCP

UDP

SMUX, SNMP Unix Multiplexer

Official

201

TCP

UDP

AppleTalk Routing Maintenance

Official

209

TCP

UDP

The Quick Mail Transfer Protocol

Official

210

TCP

UDP

ANSI Z39.50

Official

213

TCP

UDP

Internetwork Packet Exchange (IPX)

Official

218

TCP

UDP

Message posting protocol (MPP)

Official

220

TCP

UDP

Internet Message Access Protocol (IMAP), version 3

Official

259

TCP

UDP

ESRO, Efficient Short Remote Operations

Official

264

TCP

UDP

BGMP, Border Gateway Multicast Protocol

Official

280

TCP

UDP

http-mgmt

Official

300

TCP

ThinLinc Web Access

Unofficial

308

TCP

Novastor Online Backup

Official

311

TCP

Mac OS X Server Admin (officially AppleShare IP Web administration)

Official

318

TCP

UDP

PKIX TSP, Time Stamp Protocol

Official

319

UDP

Precision Time Protocol event messages

Official

320

UDP

Precision Time Protocol general messages

Official

350

TCP

UDP

MATIP-Type A, Mapping of Airline Traffic over Internet Protocol

Official

351

TCP

UDP

MATIP-Type B, Mapping of Airline Traffic over Internet Protocol

Official

356

TCP

UDP

cloanto-net-1 (used by Cloanto Amiga Explorer and VMs)

Official

366

TCP

UDP

ODMR, On-Demand Mail Relay

Official

369

TCP

UDP

Rpc2portmap

Official

370

TCP

codaauth2—Coda authentication server

Official

370

UDP

codaauth2—Coda authentication server

Official

370

UDP

securecast1—Outgoing packets to NAI's SecureCast servers^[21]As of 2000^[update]

Unofficial

371

TCP

UDP

ClearCase albd

Official

383

TCP

UDP

HP data alarm manager

Official

384

TCP

UDP

A Remote Network Server System

Official

387

TCP

UDP

AURP, AppleTalk Update-based Routing Protocol^[22]

Official

389

TCP

UDP

Lightweight Directory Access Protocol (LDAP)

Official

399

TCP

UDP

Digital Equipment Corporation DECnet (Phase V+) over TCP/IP

Official

401

TCP

UDP

UPS Uninterruptible Power Supply

Official

427

TCP

UDP

Service Location Protocol (SLP)

Official

433

TCP

UDP

NNSP, part of Network News Transfer Protocol

Official

443

TCP

Hypertext Transfer Protocol over TLS/SSL (HTTPS)

Official

443

UDP

QUIC (from Chromium) for HTTPS

Unofficial

444

TCP

UDP

SNPP, Simple Network Paging Protocol (RFC 1568)

Official

445

TCP

Microsoft-DS Active Directory, Windows shares

Official

445

TCP

Microsoft-DS SMB file sharing

Official

464

TCP

UDP

Kerberos Change/Set password

Official

465

TCP

URL Rendezvous Directory for SSM (Cisco protocol)

Official

465

TCP

Simple Mail Transfer Protocol over TLS/SSL (SMTPS)

Unofficial

475

TCP

UDP

tcpnethaspsrv (Aladdin Knowledge Systems Hasp services, TCP/IP version)

Official

491

TCP

GO-Global remote access and application publishing software

Unofficial

497

TCP

Dantz Retrospect

Official

500

TCP

UDP

Internet Security Association and Key Management Protocol (ISAKMP)

Official

502

TCP

UDP

Modbus, Protocol

Official

504

TCP

UDP

Citadel—multiservice protocol for dedicated clients for the Citadel groupware system

Official

510

TCP

UDP

FirstClass Protocol (FCP), used by FirstClass client/server groupware system

Official

512

TCP

Rexec, Remote Process Execution

Official

512

UDP

comsat, together with biff

Official

513

TCP

rlogin

Official

513

UDP

Who^[23]

Official

514

TCP

Shell—used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh)

Official

514

UDP

Syslog—used for system logging

Official

515

TCP

Line Printer Daemon—print service

Official

517

UDP

Talk

Official

518

UDP

NTalk

Official

520

TCP

efs, extended file name server

Official

520

UDP

Routing Information Protocol (RIP)

Official

521

UDP

Routing Information Protocol Next Generation (RIPng)

Official

524

TCP

UDP

NetWare Core Protocol (NCP) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc.

Official

525

UDP

Timed, Timeserver

Official

530

TCP

UDP

RPC

Official

531

TCP

UDP

AOL Instant Messenger

Unofficial

532

TCP

netnews

Official

533

UDP

netwall, For Emergency Broadcasts

Official

540

TCP

UUCP (Unix-to-Unix Copy Protocol)

Official

542

TCP

UDP

commerce (Commerce Applications)

Official

543

TCP

klogin, Kerberos login

Official

544

TCP

kshell, Kerberos Remote shell

Official

545

TCP

OSIsoft PI (VMS), OSISoft PI Server Client Access

Unofficial

546

TCP

UDP

DHCPv6 client

Official

547

TCP

UDP

DHCPv6 server

Official

548

TCP

Apple Filing Protocol (AFP) over TCP

Official

550

TCP

UDP

new-rwho, new-who^[23]

Official

554

TCP

UDP

Real Time Streaming Protocol (RTSP)

Official

556

TCP

Remotefs, RFS, rfs_server

Official

560

UDP

rmonitor, Remote Monitor

Official

561

UDP

monitor

Official

563

TCP

UDP

NNTP over TLS/SSL (NNTPS)

Official

564

TCP

Plan9

Unofficial

587

TCP

e-mail message submission^[24] (SMTP)

Official

591

TCP

FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80)

Official

593

TCP

UDP

HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server

Official

604

TCP

TUNNEL profile,^[25] a protocol for BEEP peers to form an application layer tunnel

Official

623

UDP

ASF Remote Management and Control Protocol (ASF-RMCP)

Official

625

TCP

Open Directory Proxy (ODProxy)

Unofficial

631

TCP

UDP

Internet Printing Protocol (IPP)

Official

631

TCP

UDP

Common Unix Printing System (CUPS) administration console (extension to IPP)

Unofficial

635

TCP

UDP

RLZ DBase

Official

636

TCP

UDP

Lightweight Directory Access Protocol over TLS/SSL (LDAPS)

Official

639

TCP

UDP

MSDP, Multicast Source Discovery Protocol

Official

641

TCP

UDP

SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic

Official

643

TCP

UDP

SANity

Official

646

TCP

UDP

LDP, Label Distribution Protocol, a routing protocol used in MPLS networks

Official

647

TCP

DHCP Failover protocol^[26]

Official

648

TCP

RRP (Registry Registrar Protocol)^[27]

Official

651

TCP

UDP

IEEE-MMS

Official

653

TCP

UDP

SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic

Official

654

TCP

Media Management System (MMS) Media Management Protocol (MMP)^[28]

Official

657

TCP

UDP

IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)^[29] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration

Official

660

TCP

Mac OS X Server administration

Official

666

TCP

UDP

Doom, first online first-person shooter

Official

666

TCP

airserv-ng, aircrack-ng's server for remote-controlling wireless devices

Unofficial

674

TCP

ACAP (Application Configuration Access Protocol)

Official

688

TCP

UDP

REALM-RUSD (ApplianceWare Server Appliance Management Protocol)

Official

690

TCP

UDP

VATP (Velneo Application Transfer Protocol)

Official

691

TCP

MS Exchange Routing

Official

694

TCP

UDP

Linux-HA High availability Heartbeat

Official

695

TCP

IEEE-MMS-SSL (IEEE Media Management System over SSL)^[30]

Official

698

UDP

OLSR (Optimized Link State Routing)

Official

700

TCP

EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 5734)

Official

701

TCP

LMP (Link Management Protocol (Internet)),^[31] a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links

Official

702

TCP

IRIS^[32][33] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)^[34] (RFC 3983)

Official

706

TCP

Secure Internet Live Conferencing (SILC)

Official

711

TCP

Cisco Tag Distribution Protocol^[35][36][37]—being replaced by the MPLS Label Distribution Protocol^[38]

Official

712

TCP

Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF) (RFC 3684)

Official

749

TCP

UDP

Kerberos (protocol) administration

Official

750

UDP

kerberos-iv, Kerberos version IV

Official

751

TCP

UDP

kerberos_master, Kerberos authentication

Unofficial

752

UDP

passwd_server, Kerberos Password (kpasswd) server

Unofficial

753

TCP

Reverse Routing Header (rrh)^[39]

Official

753

UDP

Reverse Routing Header (rrh)

Official

753

UDP

userreg_server, Kerberos userreg server

Unofficial

754

TCP

tell send

Official

754

TCP

krb5_prop, Kerberos v5 slave propagation

Unofficial

754

UDP

tell send

Official

760

TCP

UDP

krbupdate [kreg], Kerberos registration

Unofficial

782

TCP

Conserver serial-console management server

Unofficial

783

TCP

SpamAssassin spamd daemon

Unofficial

800

UDP

mdbe daemon

Official

808

TCP

Microsoft Net.TCP Port Sharing Service

Unofficial

829

TCP

Certificate Management Protocol^[40]

Unofficial

843

TCP

Adobe Flash^[41]

Unofficial

847

TCP

DHCP Failover protocol

Official

848

TCP

UDP

Group Domain Of Interpretation (GDOI) protocol

Official

860

TCP

iSCSI (RFC 3720)

Official

861

TCP

UDP

OWAMP control (RFC 4656)

Official

862

TCP

UDP

TWAMP control (RFC 5357)

Official

873

TCP

rsync file synchronization protocol

Official

888

TCP

cddbp, CD DataBase (CDDB) protocol (CDDBP), IBM Endpoint Manager Remote Control

Unofficial

897

TCP

UDP

Brocade SMI-S RPC

Unofficial

898

TCP

UDP

Brocade SMI-S RPC SSL

Unofficial

901

TCP

Samba Web Administration Tool (SWAT)

Unofficial

901

TCP

UDP

VMware Virtual Infrastructure Client (from managed device to management console)

Unofficial

902

TCP

UDP

ideafarm-door (IdeaFarm (tm) Operations)

Official

902

TCP

UDP

VMware Server Console (from management console to managed device)

Unofficial

903

TCP

UDP

ideafarm-panic (IdeaFarm (tm) Operations)

Official

903

TCP

VMware Remote Console^[42]

Unofficial

904

TCP

VMware Server Alternate (if 902 is in use, i.e. SUSE linux)

Unofficial

911

TCP

Network Console on Acid (NCA)—local tty redirection over OpenSSH

Unofficial

944

UDP

Network File System Service

Unofficial

953

TCP

UDP

Domain Name System (DNS) RNDC Service

Unofficial

973

UDP

Network File System over IPv6 Service

Unofficial

981

TCP

SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software

Unofficial

987

TCP

Microsoft Windows SBS SharePoint

Unofficial

989

TCP

UDP

FTPS Protocol (data): FTP over TLS/SSL

Official

990

TCP

UDP

FTPS Protocol (control): FTP over TLS/SSL

Official

991

TCP

UDP

NAS (Netnews Administration System)^[43]

Official

992

TCP

UDP

TELNET protocol over TLS/SSL

Official

993

TCP

Internet Message Access Protocol over TLS/SSL (IMAPS)

Official

994

TCP

UDP

Internet Relay Chat over TLS/SSL (IRCS)

Official

995

TCP

Post Office Protocol 3 over TLS/SSL (POP3S)

Official

999

TCP

ScimoreDB Database System

Unofficial

1002

TCP

Opsware agent (aka cogbot)

Unofficial

1010

TCP

ThinLinc Web Administration

Unofficial

1023

TCP

UDP

Reserved^[1]

Official