0 |
N/A |
N/A |
In programming APIs (not in communication between hosts), requests a system-allocated (dynamic) port[3][4] |
N/A |
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 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 |
Official |
20 |
TCP |
UDP |
FTP data transfer |
Official |
21 |
|
UDP |
FTP control (command) |
Official |
22 |
|
UDP |
Secure Shell (SSH), 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 |
Host Name Server Protocol |
Official |
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 |
Xerox Network Systems (XNS) clearinghouse |
Official |
55 |
TCP |
UDP |
ISI Graphics Language (ISI-GL) |
Official |
56 |
TCP |
UDP |
Xerox Network Systems (XNS) authentication |
Official |
56 |
TCP |
UDP |
Route Access Protocol (RAP)[12] |
Unofficial |
57 |
TCP |
UDP |
Any private terminal access |
Official |
58 |
TCP |
UDP |
Xerox Network Systems (XNS) 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 |
71–74 |
TCP |
UDP |
NETRJS protocol |
Official |
77 |
TCP |
UDP |
Any private Remote job entry |
Official |
79 |
TCP |
UDP |
Finger protocol |
Official |
80 |
|
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) Security Attribute Token Map |
Official |
90 |
TCP |
UDP |
PointCast (dotcom) |
Unofficial |
99 |
TCP |
|
WIP Message protocol |
Unofficial |
100 |
|
UDP |
CyberGate RAT protocol |
Unofficial |
101 |
TCP |
UDP |
NIC host name |
Official |
102 |
TCP |
UDP |
ISO Transport Service Access Point (TSAP) 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 |
UDP |
Remote Telnet Service[15] protocol |
Official |
108 |
TCP |
UDP |
SNA Gateway Access Server[1] |
Official |
109 |
TCP |
UDP |
Post Office Protocol v2 (POP2) |
Official |
110 |
TCP |
UDP |
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 |
Structured Query Language (SQL) 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 |
official |
137 |
TCP |
UDP |
NetBIOS Name Service |
Official |
138 |
TCP |
UDP |
NetBIOS Datagram Service |
Official |
139 |
TCP |
UDP |
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 |
Simple Gateway Monitoring Protocol (SGMP) |
Official |
156 |
TCP |
UDP |
SQL Service |
Official |
158 |
TCP |
UDP |
Distributed Mail Service Protocol (DMSP)[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 |
|
Border Gateway Protocol (BGP) |
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 |
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 |
Efficient Short Remote Operations (ESRO) |
Official |
262 |
TCP |
UDP |
Arcisdms |
Official |
264 |
TCP |
UDP |
Border Gateway Multicast Protocol (BGMP) |
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 Time Stamp Protocol (TSP) |
Official |
319 |
|
UDP |
Precision Time Protocol (PTP) event messages |
Official |
320 |
|
UDP |
Precision Time Protocol (PTP) general messages |
Official |
350 |
TCP |
UDP |
Mapping of Airline Traffic over Internet Protocol (MATIP) type A |
Official |
351 |
TCP |
UDP |
MATIP type B |
Official |
356 |
TCP |
UDP |
cloanto-net-1 (used by Cloanto Amiga Explorer and VMs) |
Official |
366 |
TCP |
UDP |
On-Demand Mail Relay (ODMR) |
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] |
official |
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 |
Uninterruptible power supply (UPS) |
Official |
427 |
TCP |
UDP |
Service Location Protocol (SLP) |
Official |
433 |
TCP |
UDP |
NNSP, part of Network News Transfer Protocol |
Official |
434 |
TCP |
UDP |
Mobile IP Agent (RFC 5944) |
Official |
443 |
|
UDP |
Hypertext Transfer Protocol over TLS/SSL (HTTPS) |
Official |
443 |
|
UDP |
QUIC (from Chromium) for HTTPS |
Unofficial |
444 |
TCP |
UDP |
Simple Network Paging Protocol (SNPP), 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 |
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) / Internet Key Exchange (IKE) |
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 |
|
Remote 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 (LPD), 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 |
Remote procedure call (RPC) |
Official |
531 |
TCP |
UDP |
AOL Instant Messenger |
Unofficial |
532 |
TCP |
|
netnews |
Official |
533 |
|
UDP |
netwall, For Emergency Broadcasts |
Official |
540 |
TCP |
|
Unix-to-Unix Copy Protocol (UUCP) |
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 |
|
9P (Plan 9) |
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 |
601 |
TCP |
|
Reliable Syslog Service — used for system logging |
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 |
Label Distribution Protocol (LDP), a routing protocol used in MPLS networks |
Official |
647 |
TCP |
|
DHCP Failover protocol[26] |
Official |
648 |
TCP |
|
Registry Registrar Protocol (RRP)[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 |
655 |
TCP |
UDP |
Tinc VPN daemon |
Unofficial |
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 |
|
Application Configuration Access Protocol (ACAP) |
Official |
688 |
TCP |
UDP |
REALM-RUSD (ApplianceWare Server Appliance Management Protocol) |
Official |
690 |
TCP |
UDP |
Velneo Application Transfer Protocol (VATP) |
Official |
691 |
TCP |
|
MS Exchange Routing |
Official |
694 |
TCP |
UDP |
Linux-HA high-availability heartbeat |
Official |
695 |
TCP |
|
IEEE Media Management System over SSL (IEEE-MMS-SSL)[30] |
Official |
698 |
|
UDP |
Optimized Link State Routing (OLSR) |
Official |
700 |
TCP |
|
Extensible Provisioning Protocol (EPP), a protocol for communication between domain name registries and registrars (RFC 5734) |
Official |
701 |
TCP |
|
Link Management Protocol (LMP),[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 |
TCP |
UDP |
mdbs-daemon |
Official |
808 |
TCP |
|
Microsoft Net.TCP Port Sharing Service |
Unofficial |
829 |
TCP |
|
Certificate Management Protocol[40] |
Unofficial |
830 |
TCP |
UDP |
NETCONF over SSH |
Official |
831 |
TCP |
UDP |
NETCONF over BEEP |
Official |
832 |
TCP |
UDP |
NETCONF for SOAP over HTTPS |
Official |
833 |
TCP |
UDP |
NETCONF for SOAP over BEEP |
Official |
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) |
Unofficial |
888 |
TCP |
|
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 |
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 |
Netnews Administration System (NAS)[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 |