PORT NUMBERS
(last updated 2009-03-18)
The port numbers are divided into three ranges: the Well Known Ports,
the Registered Ports, and the Dynamic and/or Private Ports.
The Well Known Ports are those from 0 through 1023.
DCCP Well Known ports SHOULD NOT be used without IANA registration.
The registration procedure is defined in [RFC4340], Section 19.9.
The Registered Ports are those from 1024 through 49151
DCCP Registered ports SHOULD NOT be used without IANA registration.
The Dynamic and/or Private Ports are those from 49152 through 65535
A value of 0 in the port numbers registry below indicates that no port
has been allocated.
************************************************************************
* PLEASE NOTE THE FOLLOWING: *
* *
* IESG STATEMENT TO THE IANA *
* THE IESG BELIEVES THAT IANA MAY ALLOCATE AN ADDITIONAL PORT IN *
* THE 'USER PORT' RANGE TO PROTOCOLS WHOSE CURRENT PORT ALLOCATION *
* REQUIRES ACCESS TO A PRIVILEGED PORT. THIS ALLOCATION SHOULD NOT *
* BE AUTOMATIC, BUT MAY OCCUR UPON APPLICATION BY AN INTERESTED *
* PARTY WHOSE APPLICATION WOULD OTHERWISE FIT IANA'S POLICIES. *
* 1. UNASSIGNED PORT NUMBERS SHOULD NOT BE USED. THE IANA WILL ASSIGN *
* THE NUMBER FOR THE PORT AFTER YOUR APPLICATION HAS BEEN APPROVED. *
* 2. ASSIGNMENT OF A PORT NUMBER DOES NOT IN ANY WAY IMPLY AN *
* ENDORSEMENT OF AN APPLICATION OR PRODUCT, AND THE FACT THAT NETWORK *
* TRAFFIC IS FLOWING TO OR FROM A REGISTERED PORT DOES NOT MEAN THAT *
* IT IS "GOOD" TRAFFIC. FIREWALL AND SYSTEM ADMINISTRATORS SHOULD *
* CHOOSE HOW TO CONFIGURE THEIR SYSTEMS BASED ON THEIR KNOWLEDGE OF *
* THE TRAFFIC IN QUESTION, NOT WHETHER THERE IS A PORT NUMBER *
* REGISTERED OR NOT. *
WELL KNOWN PORT NUMBERS
The Well Known Ports are assigned by the IANA and on most systems can
only be used by system (or root) processes or by programs executed by
privileged users.
Ports are used in the TCP [RFC793] to name the ends of logical
connections which carry long term conversations. For the purpose of
providing services to unknown callers, a service contact port is
defined. This list specifies the port used by the server process as
its contact port. The contact port is sometimes called the
"well-known port".
To the extent possible, these same port assignments are used with the
UDP [RFC768].
The range for assigned ports managed by the IANA is 0-1023.
Port Assignments:
Keyword Decimal Description References
------- ------- ----------- ----------
0/tcp Reserved
0/udp Reserved
# Jon Postel <postel&isi.edu>
spr-itunes 0/tcp Shirt Pocket netTunes
spl-itunes 0/tcp Shirt Pocket launchTunes
# David Nanian <dnanian&shirt-pocket.com> 28 September 2007
tcpmux 1/tcp TCP Port Service Multiplexer
tcpmux 1/udp TCP Port Service Multiplexer
# Mark Lottor <MKL&nisc.sri.com>
compressnet 2/tcp Management Utility
compressnet 2/udp Management Utility
compressnet 3/tcp Compression Process
compressnet 3/udp Compression Process
# Bernie Volz <volz&cisco.com>
# 4/tcp Unassigned
# 4/udp Unassigned
rje 5/tcp Remote Job Entry
rje 5/udp Remote Job Entry
# 6/tcp Unassigned
# 6/udp Unassigned
echo 7/tcp Echo
echo 7/udp Echo
# 8/tcp Unassigned
# 8/udp Unassigned
discard 9/tcp Discard
discard 9/udp Discard
discard 9/sctp Discard
# IETF TSVWG
# Randall Stewart <rrs&cisco.com>
# [RFC4960]
discard 9/dccp Discard SC:DISC
# IETF dccp WG, Eddie Kohler <kohler&cs.ucla.edu>, [RFC4340]
# 10/tcp Unassigned
# 10/udp Unassigned
systat 11/tcp Active Users
systat 11/udp Active Users
# 12/tcp Unassigned
# 12/udp Unassigned
daytime 13/tcp Daytime (RFC 867)
daytime 13/udp Daytime (RFC 867)
# 14/tcp Unassigned
# 14/udp Unassigned
# 15/tcp Unassigned [was netstat]
# 15/udp Unassigned
# 16/tcp Unassigned
# 16/udp Unassigned
qotd 17/tcp Quote of the Day
qotd 17/udp Quote of the Day
msp 18/tcp Message Send Protocol
msp 18/udp Message Send Protocol
# Rina Nethaniel <---none--->
chargen 19/tcp Character Generator
chargen 19/udp Character Generator
ftp-data 20/tcp File Transfer [Default Data]
ftp-data 20/udp File Transfer [Default Data]
ftp-data 20/sctp FTP
ftp 21/tcp File Transfer [Control]
ftp 21/udp File Transfer [Control]
ftp 21/sctp FTP
ssh 22/tcp SSH Remote Login Protocol
ssh 22/udp SSH Remote Login Protocol
# Tatu Ylonen <ylo&cs.hut.fi>
ssh 22/sctp SSH
telnet 23/tcp Telnet
telnet 23/udp Telnet
24/tcp any private mail system
24/udp any private mail system
# Rick Adams <rick&UUNET.UU.NET>
smtp 25/tcp Simple Mail Transfer
smtp 25/udp Simple Mail Transfer
# 26/tcp Unassigned
# 26/udp Unassigned
nsw-fe 27/tcp NSW User System FE
nsw-fe 27/udp NSW User System FE
# Robert Thomas <BThomas&F.BBN.COM>
# 28/tcp Unassigned
# 28/udp Unassigned
msg-icp 29/tcp MSG ICP
msg-icp 29/udp MSG ICP
# 30/tcp Unassigned
# 30/udp Unassigned
msg-auth 31/tcp MSG Authentication
msg-auth 31/udp MSG Authentication
# 32/tcp Unassigned
# 32/udp Unassigned
dsp 33/tcp Display Support Protocol
dsp 33/udp Display Support Protocol
# Ed Cain <cain&edn-unix.dca.mil>
# 34/tcp Unassigned
# 34/udp Unassigned
35/tcp any private printer server
35/udp any private printer server
# 36/tcp Unassigned
# 36/udp Unassigned
time 37/tcp Time
time 37/udp Time
rap 38/tcp Route Access Protocol
rap 38/udp Route Access Protocol
# Robert Ullmann <ariel&world.std.com>
rlp 39/tcp Resource Location Protocol
rlp 39/udp Resource Location Protocol
# Mike Accetta <MIKE.ACCETTA&CMU-CS-A.EDU>
# 40/tcp Unassigned
# 40/udp Unassigned
graphics 41/tcp Graphics
graphics 41/udp Graphics
name 42/tcp Host Name Server
name 42/udp Host Name Server
nameserver 42/tcp Host Name Server
nameserver 42/udp Host Name Server
nicname 43/tcp Who Is
nicname 43/udp Who Is
mpm-flags 44/tcp MPM FLAGS Protocol
mpm-flags 44/udp MPM FLAGS Protocol
mpm 45/tcp Message Processing Module [recv]
mpm 45/udp Message Processing Module [recv]
mpm-snd 46/tcp MPM [default send]
mpm-snd 46/udp MPM [default send]
ni-ftp 47/tcp NI FTP
ni-ftp 47/udp NI FTP
# Steve Kille <S.Kille&isode.com>
auditd 48/tcp Digital Audit Daemon
auditd 48/udp Digital Audit Daemon
# Larry Scott <scott&zk3.dec.com>
tacacs 49/tcp Login Host Protocol (TACACS)
tacacs 49/udp Login Host Protocol (TACACS)
# Pieter Ditmars <pditmars&BBN.COM>
re-mail-ck 50/tcp Remote Mail Checking Protocol
re-mail-ck 50/udp Remote Mail Checking Protocol
# Steve Dorner <s-dorner&UIUC.EDU>
la-maint 51/tcp IMP Logical Address Maintenance
la-maint 51/udp IMP Logical Address Maintenance
# Andy Malis <malis_a&timeplex.com>
xns-time 52/tcp XNS Time Protocol
xns-time 52/udp XNS Time Protocol
# Susie Armstrong <Armstrong.wbst128@XEROX>
domain 53/tcp Domain Name Server
domain 53/udp Domain Name Server
# Paul Mockapetris <PVM&ISI.EDU>
xns-ch 54/tcp XNS Clearinghouse
xns-ch 54/udp XNS Clearinghouse
isi-gl 55/tcp ISI Graphics Language
isi-gl 55/udp ISI Graphics Language
xns-auth 56/tcp XNS Authentication
xns-auth 56/udp XNS Authentication
57/tcp any private terminal access
57/udp any private terminal access
xns-mail 58/tcp XNS Mail
xns-mail 58/udp XNS Mail
59/tcp any private file service
59/udp any private file service
60/tcp Unassigned
60/udp Unassigned
ni-mail 61/tcp NI MAIL
ni-mail 61/udp NI MAIL
acas 62/tcp ACA Services
acas 62/udp ACA Services
# E. Wald <ewald&via.enet.dec.com>
whois++ 63/tcp whois++
whois++ 63/udp whois++
# Rickard Schoultz <schoultz&sunet.se>
covia 64/tcp Communications Integrator (CI)
covia 64/udp Communications Integrator (CI)
# Dan Smith <dan.smith&den.galileo.com>
tacacs-ds 65/tcp TACACS-Database Service
tacacs-ds 65/udp TACACS-Database Service
# Kathy Huber <khuber&bbn.com>
sql*net 66/tcp Oracle SQL*NET
sql*net 66/udp Oracle SQL*NET
# Jack Haverty <jhaverty&ORACLE.COM>
bootps 67/tcp Bootstrap Protocol Server
bootps 67/udp Bootstrap Protocol Server
bootpc 68/tcp Bootstrap Protocol Clien...
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